[21] I don’t think _____ possible to master a foreign language without much memory work.

　　A. this 　 B. that

　　C. its 　 D. it

　　[答案] D。 6123结构，参见本站相关内容。

　　[22] In front of her was Professor A, _____ of the physics department in the State Unviersity.

　　A. a head 　 B. one head

　　C. head 　 D. an head

　　[答案] C。 系主任只有一个，不加冠词。

　　[23] The American friend is staying at a hotel. Let’s go and _____ the hotel.

　　A. call on 　 B. call for

　　C. call up 　 D. call at

　　[答案] D。 call on拜访某人(宾语是人);call for 需要;call up打电话; call at拜访某人(宾语是地点)。

　　[24] ----- Would you like to join us in the travel? -----________.

　　A. I hope 　 B. I hope it

　　C. I hope to 　 D. I hope to join

　　[答案] C。 当不定式作hope的宾语，可以直接用to代替。

　　[25] When the boss asked her to leave the company, she became _____.

　　A. a cross 　 B. cross

　　C. across 　 D. crossing

　　[答案] B。 cross可以是形容词，"生气，恼怒"的意思。

　　[26] He was very ill, but he refused _____ his work.

　　A. leaving 　 B. him

　　C. that he left 　 D. to leave

　　[答案] D。 refuse 后面跟不定式作宾语。

　　[27] I’ve never thought _____ going to the United States.

　　A. over 　 B. for

　　C. of 　 D. /

　　[答案] C。 think of 想到;think over 后面不接动名词;think不和for连用。

　　[28] There are some _____ assistants in that _____ shop.

　　A. woman; shoe 　 B. women; shoe

　　C. women; shoes 　 D. woman; shoes

　　[答案] B。 名词作定语一般用单数;但有man和woman作定语，都得用复数。

　　[29] The first textbooks written for teaching English as a foreign language ______ in the 16th century.

　　A. came out 　 B. came about

　　C. came across 　 D. came round

　　[答案] A。 come out出版; come about 发生;come across 偶然碰见;came round绕道而行。

　　[30] My brother _____ while he _____ his bike and hurt himself.

　　A. fell; was riding 　 B. was breaking; was playing

　　C. broke; wa playing 　 D. was playing; broke

　　[答案] A。 fall是瞬间动词，while引导的从句一般是进行时态。

　　[31] Lying in bed, we listened to the heavy rain ______ the window.

　　A. hitting 　 B. knocking

　　C. beating 　 D. striking

　　[答案] C。 hit 打一下，击中;knock 敲，叩;beat连续不断的敲打; strike突然性的一次打击。

　　[32] Be sure to write to us, ______?

　　A. will you 　 B. aren’t you

　　C. can you 　 D. mustn’t you

　　[答案] A。 祈使句的反意疑问句，要用will you。

　　[33] Such a problem is _____ difficult for a primary school student _____.

　　A. so; to work 　 B. very too; to work out

　　C. rather too; to work out 　 D. quite too; to answer

　　[答案] C。 该句含有一个too…to… 结构，very不能修饰这个结构; work out算出，计算出;制定出。

　　[34] _____ about the history of that part because there is not enough written information.

　　A. Much knows 　 B. much is known

　　C. People knows a little　　　 D. Little is known

　　[答案] D。 little位于句首，主句要部分倒装。

　　[35] He _____ his leg when he _____ in a football match against another school.

　　A. broke; played 　 B. was breaking; was playing

　　C. broke; was playing 　 D. was playing; broke

　　[答案] C。 当主句的谓语动词是瞬间动词，时间状语从句中一般是进行时态。