16._______ a teacher, one must first be a pupil.

　　A. Being

　　B. Having been

　　C. To be

　　D. To have been

　　【答案】 C 这句话强调的是目的 to就表示目的，意思是要想成为一名老师，首先必须是一个学生。A选项表示已经是一位老师。

　　17.They all returned to the village ___ that the danger was over.

　　A. convincing

　　B. convinced

　　C. to convince

　　D. having convinced

　　【答案】B convinced that…=they were convinced that….“他们确信”省略了they were . 过去分词一般修饰人,意为 “被…的”, 现在分词一般修饰物,意为 “令人…的”,所以要用过去分词. 句意是“他们回到村庄,确信危险已经结束了.”

　　18. ___ anything about the accident, he went to work as well.

　　A. Not know

　　B. Know not

　　C. Knowing not

　　D. Not knowing

　　【答案】D。本句为分词短语的否定式做状语。

　　19. Don’t forget ___ the window before leaving the room.

　　A. to have closed

　　B. to close

　　C. having closed

　　D. closing

　　【答案】B。forget+动词不定式作宾语表示动作尚未发生。I am afraid I will forget to give the letter to him.我担心我会忘了把这封信交给他。(动词不定式表示一个发生在forget 之后的一个将来的动作。)forget +动名词作宾语，表示动作已经发生。I forget giving the letter to him.我忘了已经把信给他了。(动名词表示一个发生在forget之前的动作。)类似的动词有remember，regret等。本句的意思是“走的时候别忘了关窗户。”动作还没有发生，因此用动词不定式。

　　20. ____ tired, after a hard work, she fell into bed and went straight to sleep. (QE98-50)

　　A. Felt B. Feeling

　　C. Being felt D. To feel

　　【答案】B。不定式结构表示还没有发生的动作，所以D项不符合题意“她觉得很累，所以去睡觉了”;she是feel的逻辑主语，它们之间是主动关系，所以应该选现在分词。A和C项均为过去分词形式，表被动。

　　21. So many representatives _______ , the conference had to be put off.

　　A. were absent

　　B. to be absent

　　C. being absent

　　D. had been absent

　　【答案】C 本题考查分词做原因状语。缺席，“be absent”在独立主格结构中，用分词结构表达“being absent”，或者省略be。

　　22. The plane crashed, its bombs ___ as it hit the ground.

　　A. exploded

　　B. were exploded

　　C. exploding

　　D. were exploding

　　【答案】C 此句前后两部分没有and连接，不是一个并列句，横线处不能填做谓语的动词;its bombs___ as it hit the ground.为独立主格结构，逻辑主语是its bombs：炸弹，可以发出炸弹的动作，故用explore的现在分词：exploding表主动;过去分词：exploded表被动;as it hit the ground：当它(飞机)撞地面的时候，作独立主格结构中的时间状语从句。

　　23._____, he’ll make a first-class tennis player.

　　A. Giving time

　　B. To give time

　　C. Given time

　　D. Being given time

　　【答案】C。考查非谓语。只要有时间，他就能够成为一流的网球选手。首先he和give time之间是被动关系，因此排除A、B。再有“给时间”和“成为一个优秀的网球选手”之间的关系是先给时间，再成为网球选手，而不是一边给时间，一边成为网球选手，因此排除D。

　　24.The interviewer should take down notes at the moment the person ___ answers the questions.

　　A. to be interviewed

　　B. interviewing

　　C. being interviewed

　　D. interviewed

　　【答案】C 本题考查的是分词作状语。the person和interview是被动关系，并强调和前一动作“take down notes”同时进行，所以选C。

　　25. With the flowers ___everywhere, the park looks beautiful.

　　A. to bloom

　　B. blooming

　　C. be blooming

　　D. to be blooming

　　【答案】B 本句测试with介词短语引导的分词独立主格。with后面接复合宾语。因为宾语the flowers和宾语补足语之间是逻辑的主动关系。因此用现在分词。因此B为正确答案。本句的意思是：“到处鲜花盛开，公园非常美丽。”

　　26. “Car 17 won the race.”“Yes, but its driver came close to ___ killed.”

　　A. being B. having been

　　C. be D. have been

　　【答案】A。本题考查固定搭配及非谓语的时态。came close to doing是固定搭配。而being killed和won之间无先后顺序。

　　27. He changed his name, _____ that nobody would find out what he had done before.

　　A. having thought B. to think

　　C. thinks D. thinking

　　【答案】D。本题考查的是非谓语ing表示伴随状态。改变名字的同时就在想不让别人发现自己以前做了什么。由于非谓语think这个动作，与谓语动词change同时发生，因此选择D。

　　28. I spent half an hour ___ this difficult math problem.

　　A. having worked on

　　B. to work on

　　C. on work

　　D. working on

　　【答案】D。spend(some time ，some money) in doing sth(on sth)，因此选D。He spent his life writing the book.他花一生的时间写这本书。He spends more time on sports than on studies. 他花在体育运动上的时间比花在学习上的时间多。