[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。
