4.　　　 指挥官命令我开枪。(command；fire)

3.　　　 实际上，我们要充分的利用每次机会来练习口语。(make use of)

2. 直走你就会看到学校在邮局的旁边。(straight)

1. 电脑在我们的生活中起到重要的作用。(play a part in)

10. One of the requirements of the job is __________in two or more African languages.

A. fluent　　　　　　 B. fluency　　　　　　 C. frequent　　　 D. frequency

9. Can you explain how it _______ that you missed the morning classes?

A. came across　　　　 B. came to　　　　　　 C. came up　　　　　 D. came about

8. He realized she was crying ________ what he had sad.

A. because　　　 B. because of　　　　　 C. as　　　　　 D. since

7. Don’t respond to any e-mails ______ personal information, no matter how official they look.

　 A. searching　 　B. asking　 　　C. requesting　 　D. questioning

6. He changed so much that I didn’t _______ him at first sight.

A. know　 　　B. recognize　 C. enjoy 　　　　D. agree

5. It is always difficult being in a foreign country, _______ if you don’t speak the language.

　 A. specially　 B. especially　 C. entirely　 　　D. exactly