[1] The research is so designed that once ______ nothing can be done to change it.

　　A. begins 　 B. having begun

　　C. beginning 　 D. begun

　　[答案] D。 once begun是once引导的条件状语从句的省略形式。= Once it is begun

　　[2] One way to understand thousands of new words is to gain _____ good knowledge of basic word formation.

　　A. / 　 B. the

　　C. a 　 D. one

　　[答案] C。 have / gain a knowledge of 是一个固定搭配，"掌握"的意思。

　　[3] Luckily, the bullet narrow missed the captain ______ an inch.

　　A. by 　 B. at

　　C. to 　 D. from

　　[答案] A。 by an inch 相隔一英寸。固定表达法。

　　[4] I feel it is your husband who _____ for the spoiled child.

　　A. is to blame 　 B. is going to blame

　　C. is to be blamed 　 D. should blame

　　[答案] A。 责备，抱怨某人，用主动形式不用被动。Sb. is to blame for sth.

　　[5] Mrs. Black doesn’t believe her son is able to design a digital camera, ________?

　　A. is he 　 B. isn’t he

　　C. doesn’t she 　 D. does she

　　[答案] D。 复合句的反意疑问句的附加疑问部分一般说来与主句一致。

　　[6] We thought of selling this old furniture, but we’ve decided to _____ it. It might be valuable.

　　A. hold on to 　 B. keep up with

　　C. turn to 　 D. look after

　　[答案] A。 hold on to保留;keep up with保持联系;turn to求助于;look after照料。

　　[7] There is a feeling _____ me______ we’ll never know what a UFO is --- not ever.

　　A. in; that 　 B. on; which

　　C. for; for which 　 D. by; what

　　[答案] A。 在某人身上介词用in;此句中有一个同位语从句。

　　[8] Perseverance is a kind of quality--- and that is _____ it takes to do anything well.

　　A. what 　 B. that

　　C. which 　 D. why

　　[答案] A。 此句是it take sth. to do sth.句型。perseverance做take的宾语。

　　[9] He was about to tell me the secret_____ someone patted him on the shoulder.

　　A. as 　 B. until

　　C. while 　 D. when

　　[答案] D。 在主句是be about to do sth.的情况下，从句用when引导。

　　[10] _____ to sunlight for too much time will do harm to one’s skin.

　　A. Exposed 　 B. having exposed

　　C. Being exposed 　 D. After being exposed

　　[答案] C。 动名词短语做主语，用系表结构表示状态。

　　[11] _____ she was afraid at that time, she would say no to the plan.

　　A. But for 　 B. If

　　C. But that 　 D. When

　　[答案] C。 but that　"要不是"，引导一个从句。

　　[12] --What’s the matter? You really look down. -- _______. --Well, better luck next time.

　　A. Why, I always look up to you 　 B. I failed an important test

　　C. I have a bad cold 　 D. Me? I never look down upon anybody

　　[答案] B。 look down意为"情绪低落"，下句"望你下一次走好运"与"考试不及格"相吻合。

　　[13] So loudly_______ that everyone of the class could hear him.

　　A. did he speak 　 B. did he spoke

　　C. spoke he 　 D. he spoke

　　[答案] A。 "So+形容词"，"So+副词"放于句首时，构成倒装句，句中要加助动词。

　　[14] --May I have a talk with one of your sports reporters?　--Sorry, but all of them are out to______the main events of the day.

　　A. get 　 B. find

　　C. cover 　 D. search

　　[答案] C。 get the information得到信息，find找到，cover the events采访事件，search the house搜查这所房子。

　　[15] --Did you write to Mary last month? --No, but I’ll_______her over Christmas Day.

　　A. be seen 　 B. be seeing

　　C. have seen 　 D. have been seeing

　　[答案] B。 将来进行时will/shall be doing sth.。可用于表达预计即将发生或势必要发生的动作，在一般情况下可和一般将来时换用，用将来进行时则显得更加委婉。