1 . People liked O. Henry’s stories, because simple as the tales were, they ______ finish with a sudden change at the end, to the readers’ surprise.

A．could

B．would

C．might

D．must

2 . During the special period of fighting against the infective illness, you ________ wear a mask when going out.

A．must

B．can

C．need

D．may

3 . 用方框中单词的适当形式完成下列句子，每个单词只能使用一次。

depress,        innovator,        official,        special            system,          react,             qualify

1. The government ________ announced the news to the reporters.
2. The first ________ of most participants to the experiment is fear.
3. Previous teaching experience is a necessary ________ for this job.
4. Despite the ________ result, Jenny didn’t give up and was determined to try again.
5. We must constantly ________ to keep up with the fast development of high technology.
6. Keep studying, and you can become an expert or a (an) _________ in something one day.
7. We are amazed at her ________ approach to the problem, which has been a fixed and efficient way for many years.

4 . 为了在竞争激烈的广告界脱颖而出，他们必须将最高水准的设计与创造性的方法结合起来。（汉译英）

5 . 我们的言行必须一致。（corespond, behavior）(汉译英)

6 . 我们必须提高认识并采取行动减少塑料垃圾。（汉译英）
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