Shopping has always been something of an impulse activity, in which objects that catch our fancy while strolling are immediately bought on a whim. Advertisers and sellers have taken advantage of this fact, carefully positioning inexpensive but attractive items on paths that we are most likely to cross, hoping that our human nature will lead to a greater profit for them. With the dawn of the Internet and its exploding use across the world, the same tactics apply.
Advertisers now place "banners", links to commercial web sites decorated with attractive pictures designed to catch our eyes while browsing the webs, on key web sites with heavy traffic. They pay top dollar for the right, thus creating profits for the hosting web site as well. These actions are performed in the hopes that during the course of our casual and leisurely web surfing, we’ll click on that banner that sparks our interest and thus, in theory, buy the products advertised.
Initial results have been positive. Web sites report a huge inflow of cash, both from the advertisers who tempt customers in with the banners and the hosting web sites, which are paid for allowing the banners to be put in place. As trust and confidence in Internet buying increases and information security is heightened with new technology, the volume of buying is increasing, leading to even greater profits.
The current situation, however, is not quite as optimistic. Just as magazine readers tend to unconsciously ignore advertisements in their favorite periodicals, web browsers are beginning to allow banners to slip their notice as well. Internet users respond to the flood of banners by viewing them as annoyances, a negative image that is hurting sales, since users are now less reluctant to click on those banners, preferring not to support the system that puts them in place. If Internet advertising is to continue to be a viable and profitable business practice, new methods will need to be considered to reinvigorate the industry.
With the recent depression in the technology sector and slowing economy, even new practices may not do the trick. As consumers are saving more and frequenting traditional real estate businesses over their Internet counterparts, the fate of Internet business is called into question. The coming years will be the only reliable indication of whether shopping on the world wide web is the wave of the future or simply an impulse activity whose whim has passed.

A:has taken the place of more traditional methods of advertising B:is one of the most effective ways to make profits on the web C:is paralleling advertising methods in traditional business settings D:seeks to tempt customers through impulse shopping methods

Great changes (have) (taken place) (since) I (had visited) the city.（　）

A:have B:taken place C:since D:had visited

Passage Five
Hollywood (好莱坞) is a suburb of the city of Los Angeles (洛杉矶) in California. Until 1908 it was no more than a quiet village on the northern side of the city, but in that year William Selig, one of the first people to make films, set up a film-producing workshop (车间) in Los Angeles. By 1911 , David and William Horsely had set up another one in Hollywood, and at about the same time oil was discovered in the neighborhood. Thus Hollywood quickly became a big district given over to the film industry and to oil wells
The early makers of films found Hollywood a good place for their work because of its clear, sunny, rain-free weather, which allowed pictures to be taken all the year round. Also, it was known that every kind of scene needed for films, whether town, country, sea, desert or snow-capped mountains, could be found within the area of California. Today, when most films can be "shot" (拍摄) under cover by man made lighting, these advantages (优点) are not so important.
In spite of a drop in its importance, Hollywood remains a center of film production although now making more films for television than for the cinema.

A:more television films are produced B:man-made fighting has completely taken the place of natural light C:few films are taken for the cinema D:oil production has become more important than the film industry

Passage Five
Hollywood (好莱坞) Is a suburb of the city of Los Angeles (洛杉矶) in California. Until 1908 it was no more than a quiet village on the northern side of the city, but in that year William Selig, one of the first people to make films, set up a film-producing workshop (车间) in Los Angeles. By 1911, David and William Horsely had set up another one in Hollywood, and at about the same time oil was discovered in the neighborhood. Thus Hollywood quickly became a big district given over to the film industry and to oil wells (没井).
The early makers of films found Hollywood a good place for their work because of its clear, sunny, rain-free weather, which allowed pictures to be taken all the year round. Also, it was known that every kind of scene needed for films, whether town, country, sea, desert or snow-capped mountains, could be found within the area of California. Today, when most films can be "shot" (拍摄) under cover by man made lighting, these advantages (优点) are not so important.
In spite of a drop in its importance, Hollywood remains a center of film production although now making more films for television than for the cinema.

A:more television films are produced B:man-made lighting has completely taken the place of natural light C:few films are taken for the cinema D:oil production has become more important than the film industry

The second injection should have been given once the first drug had {{U}}taken effect{{/U}}.

A:taken place B:injected C:worked out D:worked

The second injection should have been given once the first drug had {{U}}taken effect{{/U}}.

A:taken place B:injected C:worked out D:worked

The second injection should only have been given once the first drug had {{U}}taken effect{{/U}}.

A:taken place B:injected C:worked out D:worked