Don’t be careless again, （　）

A:will you B:are you C:did you D:do you

You know that pearls grow inside oysters, but would you ever think to look for diamonds inside an ostrich Well, a hunter once shot an ostrich and discovered, to his great surprise, that the big bird had swallowed a bunch of diamonds. How could such a strange thing happen
Like many other birds, the ostrich swallows small stones that stay inside its "gizzard." The gizzard is a bird’s second stomach. It is where the food is ground up. The small stones help to grind up the food so it can be digested. They do the chewing, because birds don’t have teeth. In the case of the ostrich with the diamonds, the bird simply had expensive taste in rocks. He used the diamonds to help digest his dinner.
Diamonds and stones aren’t all that an ostrich will swallow. If there are no stones around, it will eat just about anything. Sadly for ostriches in zoos this can be a fatal habit. The tendency to swallow anything it sees has caused the death of many an ostrich. Cruel or careless people often throw things into the bird’s living space. They throw keys, coins, even large objects such as horseshoes. The ostrich swallows them without hesitation. Coins can be the worst. Inside the ostrich they wear down to a razor sharp edge. They will cut open the bird’s gizzard from the inside. One young zoo ostrich died with 484 coins, weighing more than eight pounds, in its gizzard.

A:foolish B:careless C:deadly D:cruel

Don't be careless again, （　）

A:will you     B:are you     C:did you     D:do you

You know that pearls grow inside oysters, but would you ever think to look for diamonds inside an ostrich Well, a hunter once shot an ostrich and discovered, to his great surprise, that the big bird had swallowed a bunch of diamonds. How could such a strange thing happen
Like many other birds, the ostrich swallows small stones that stay inside its "gizzard." The gizzard is a bird’s second stomach. It is where the food is ground up. The small stones help to grind up the food so it can be digested. They do the chewing, because birds don’t have teeth. In the case of the ostrich with the diamonds, the bird simply had expensive taste in rocks. He used the diamonds to help digest his dinner.
Diamonds and stones aren’t all that an ostrich will swallow. If there are no stones around, it will eat just about anything. Sadly for ostriches in zoos this can be a fatal habit. The tendency to swallow anything it sees has caused the death of many an ostrich. Cruel or careless people often throw things into the bird’s living space. They throw keys, coins, even large objects such as horseshoes. The ostrich swallows them without hesitation. Coins can be the worst. Inside the ostrich they wear down to a razor sharp edge. They will cut open the bird’s gizzard from the inside. One young zoo ostrich died with 484 coins, weighing more than eight pounds, in its gizzard.
"Fatal" is another word for ______.

A:foolish B:careless C:deadly D:cruel

Don't be careless again, （）

A:will you B:are you C:did you D:do you

You know that pearls grow inside oysters, but would you ever think to look for diamonds inside an ostrich Well, a hunter once shot an ostrich and discovered, to his great surprise, that the big bird had swallowed a bunch of diamonds. How could such a strange thing happen
Like many other birds, the ostrich swallows small stones that stay inside its "gizzard." The gizzard is a bird’s second stomach. It is where the food is ground up. The small stones help to grind up the food so it can be digested. They do the chewing, because birds don’t have teeth. In the case of the ostrich with the diamonds, the bird simply had expensive taste in rocks. He used the diamonds to help digest his dinner.
Diamonds and stones aren’t all that an ostrich will swallow. If there are no stones around, it will eat just about anything. Sadly for ostriches in zoos this can be a fatal habit. The tendency to swallow anything it sees has caused the death of many an ostrich. Cruel or careless people often throw things into the bird’s living space. They throw keys, coins, even large objects such as horseshoes. The ostrich swallows them without hesitation. Coins can be the worst. Inside the ostrich they wear down to a razor sharp edge. They will cut open the bird’s gizzard from the inside. One young zoo ostrich died with 484 coins, weighing more than eight pounds, in its gizzard.

A:foolish B:careless C:deadly D:cruel

A careless person is apt to make mistakes

A:likely B:readily C:surely D:seemingly

How to Be a Nurse The physicians in a hospital form the core of the medical staff. But they could not provide effective medical care to their patients without the help of numerous other medical employees. From the view point of the patients, the nursing staff is particularly important. Nurses are usually in close contact with patients as long as they are in the hospital. A nurse does not study for as many years as a doctor. However each must be equally dedicated. Caring for sick persons requires a great deal of patience and concern. Most nurses work long days, and they often must work at odd hours or during the night. Under the supervision of the head nurse, the nursing staff must provide nursing services on a 24-hour basis and attend to patients’ needs. This responsibility continues around the clock, and so nurses must work in shifts. A shift is a period of duty usually eight in length. The nurses on the ward rotate their shifts. Some take turns working night duty; others work odd shifts. All of them work out of a central area on the ward called the nurses’ station. A nurse must always be alert. She can never afford to be careless. This is true in all nursing situation, but it is especially true in the intensive care unit. Patients under intensive care are critically ill, and they must be monitored at all times. The nurses who do intensive care duty have one of the most demanding jobs in the hospital. Serving as a nurse can be a very rewarding job. But it is not an easy one. Not every person is suited to become a nurse. Only very dedicated people have chosen nursing as a profession. Why must nurses work in shifts?

A:They are careless. B:Nursing services must be provided continuously. C:They work at night from time to time. D:A shift is usually eight hours long.