练习答案 Key to written exercises 1．关头句型练习答案
A detectives were waiting(1.1); They were expecting(1.2); detectives were waiting(1.5); others were waiting(1.6);two detectives were keeping guard(11.7-8)
B 1 When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield.
2 When two of the detectives opened the parcel, two others were keeping guard at the door. C (sample answers)
1 I was getting into my bath when you telephoned me. 2 I was reading Hamlet when you saw me in the library this morning.
3 I was saying that you must see the new film when you interruped me.
D 1 was leaving…arrived 2 worked/ was working…was sitting/ sat3 was walking…met 4 was reading…heard
5 was preparing…set/ was setting 6 dropped…spoke 2．难点练习答案
1 He gave all his books away.
2 She woke the children up early this morning. 4 They cut the king's head off. 5 Put your hat and coat on. 7 Help me to lift this table up.
8 Take your shoes off and put your slippers on.
11 They have pulled the old building down.12 Make your mind up.
14 She threw all those old newspapers away. 3．多项选择题答案
1. b按照课文第3-4行someone had told the police that thieves would try to stealthe diamond 和第8-9行While two detectives were keeping guard at thedoor…可以判断出b. to prevent a robbery 是正确答案，其他3个都不合错误.
2. c按照课文最后一句话To their surprise, the precious parcel was full of stonesand sand! 可以推测出c. didn’t prevent the robbery 是正确的答案.其他3个选择都不合适课文内容.
3. c从答复中可以看出，此问句是对地点提问的， a. Why, b. When, d. What 都不克不及针对地点提问，只有c. Where是问地点的，可以用At the airport 来答复，所以选c. 4. d这一句是针对动词宾语提问的，答复是用名词短语A valuable parcel of diamonds . a. Why, b.
When , C. where 这几个疑问词都不克不及针对动词宾语（名词）提问的，只有d. What 可以对名词提问.
5. a前面句子是过来完成时（hadtold）,暗示在过来某一动作或情况产生之前完成的事情，“某人告知警察....”这一事件一定是在“飞机到达之前”产生的.
所以正确答案选a. before(在……之前)6. ca. in前面需要有一个暗示地点的名词，意思才完整；b. into在意思上讲欠亨；d. for前面需要有一个名词做宾语，意思才完整；只有c. inside(在里面)意思最完整，并且与前半句的动作went
into the building相合适，所以选c.
7. d4个选择中只有d. took it off 最合适题目意思和语法，所以选d.
8. ab. waiting 是不及物动词，前面不克不及直接跟名词；c. expecting for 中的expect是及物动词，前面不克不及加for; d. expecting to 中expect前面不克不及加to; 只有a. expecting最合适语法.
9. c本句需要选一个与前句中的valuable(宝贵的，珍贵的)意思相同的形容词做表语.
a. worth 可以做名词和形容词，意思是“价值”，“值得……的”，不是valuable的同义词；b. worthy 是形容词，意思是“有价值的”“值得的”常于of 或不定式连用，不克不及单独做表语，也不是valuable的同义词；d. value 是名词，不合适词性；只有c. precious 是形容词，意思是“宝贵的”，“珍贵的”，是valuable的同义词,可以做表语，所以选c10. bc. take from , d. take to 都不合适语法；a. rob 和b. steal都有“窃取”的意思，但steal强调“偷偷地或悄悄地趁人不注意时窃取”，而rob则强调“通过武力明目张胆地盗窃或抢劫”.Steal这一动作的执行者应该是thief(小偷)，而rob的动作执行者却是robber(强盗).因为本句的主语是thethieves,所以选b.
11. a本句是要解释前一句中的 the main building(主
楼)，b. smallest(最小的)；c. first(第一)；d.
greatest(最伟大的)这3个选择都不合适词义，只有a. most important(最重要的)意思与themain意思最接近，所以应该选a.
12. b本句如果选a. full with, c. full by, d. full in 都有语法错误，full 只能同of连用，暗示“充满……的”，因此选b. full of.
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