(Despite) much research, there are still certain elements (in) the life cycle of the insect that (is) not fully (Understood) .

A:Despite B:in C:is D:Understood

I tried to ______ that everybody understood the instructions.

A:secure B:assure C:ensure D:issue

He had understood nothing ______ to understand.

A:neither he had sought B:nor had he sought C:and he had neither sought D:and nor he had sought

She felt frustrated when nobody understood what she was trying to say.

A:boring B:upset C:angry D:dull

According to the passage, "weight" should be understood in the sense that

A:it is fixed if it is outside the earth's gravitational pull. B:it decreases four times when it is 4,000 miles from the earth's center. C:it varies with the change of the gravitational attraction between two objects. D:things increase in amount as they are closer to the earth's surface.

In the term of shipment“until”referring to date of shipment will be understood to exclude the date mentioned．( )

Which of the following expressions applying to any date or period in the credit referring to shipment will be understood to include the date mentioned( )

A:Until B:After C:Before D:To

The figure like 1/10/2005 in British English will be understood as January 10, 2005, while in American English will be understood as October 1, 2005．( )

The words “between” applying to any date or period in the credit referring to shipment will be understood to include the date mentioned.( )

When I lived in Spain, some Spanish friends of mine decided to visit England by car. Before they left, they asked me for advice about how to find accommodation. I suggested that they should stay at "bed and breakfast" houses, because this kind of accommodation gives a foreign visitor a good chance to speak English with the family. My friends listened to my advice, but they came back with some funny stories.
"We didn’t stay at bed and breakfast houses," they said, "because we found that most families were away on holiday. "
I thought this was strange. Finally I understood what had happened. My friends spoke little English, and they thought "VACANCIES" meant "holidays", because the Spanish word for "holiday" is "vacation". So they did not go to house where the sign outside said "VACANCIES", which in English means there are free rooms. Then my friends went to house where the sign said " NO VACANCIES", because they thought this meant the people who owned the house were not away on holiday. But they found that these houses were all full. As a result, they stayed at hotels!
We laughed about this and about mistakes my friends made in reading other signs. In Spanish, the word "DIVERSION" means fun. In English, it means that workmen are repairing the road, and that you must take a different road. When my friends saw the word "DIVERSION" on a road sign, they thought they were going to have fun. Instead, the road is blocked by a crowd.
English people have problems too when they learn foreign languages. Once in Paris when someone offered me some more coffee, I said "Thank you" in French. I meant that I would like some more. However, to my surprise the coffee pot was taken away! Later I found out that "Thank you" in French means "No, thank you".
I was surprised when the coffee pot was taken away because I ______.

A:hadn’t finished drinking my coffee B:was expecting another cup of coffee C:meant that I didn’t want any more D:was always understood