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

　　A. Being

　　B. Having been

　　C. To be

　　D. To have been

　　【答案】 C 這句話強調(diào)的是目的 to就表示目的，意思是要想成為一名老師，首先必須是一個學生。A選項表示已經(jīng)是一位老師。

　　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….“他們確信”省略了they were . 過去分詞一般修飾人,意為 “被…的”, 現(xiàn)在分詞一般修飾物,意為 “令人…的”,所以要用過去分詞. 句意是“他們回到村莊,確信危險已經(jīng)結(jié)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。本句為分詞短語的否定式做狀語。

　　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+動詞不定式作賓語表示動作尚未發(fā)生。I am afraid I will forget to give the letter to him.我擔心我會忘了把這封信交給他。(動詞不定式表示一個發(fā)生在forget 之后的一個將來的動作。)forget +動名詞作賓語，表示動作已經(jīng)發(fā)生。I forget giving the letter to him.我忘了已經(jīng)把信給他了。(動名詞表示一個發(fā)生在forget之前的動作。)類似的動詞有remember，regret等。本句的意思是“走的時候別忘了關(guān)窗戶�！眲幼鬟�沒有發(fā)生，因此用動詞不定式。

　　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。不定式結(jié)構(gòu)表示還沒有發(fā)生的動作，所以D項不符合題意“她覺得很累，所以去睡覺了”;she是feel的邏輯主語，它們之間是主動關(guān)系，所以應(yīng)該選現(xiàn)在分詞。A和C項均為過去分詞形式，表被動。

　　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 本題考查分詞做原因狀語。缺席，“be absent”在獨立主格結(jié)構(gòu)中，用分詞結(jié)構(gòu)表達“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 此句前后兩部分沒有and連接，不是一個并列句，橫線處不能填做謂語的動詞;its bombs___ as it hit the ground.為獨立主格結(jié)構(gòu)，邏輯主語是its bombs：炸彈，可以發(fā)出炸彈的動作，故用explore的現(xiàn)在分詞：exploding表主動;過去分詞：exploded表被動;as it hit the ground：當它(飛機)撞地面的時候，作獨立主格結(jié)構(gòu)中的時間狀語從句。

　　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�？疾榉侵^語。只要有時間，他就能夠成為一流的網(wǎng)球選手。首先he和give time之間是被動關(guān)系，因此排除A、B。再有“給時間”和“成為一個優(yōu)秀的網(wǎng)球選手”之間的關(guān)系是先給時間，再成為網(wǎng)球選手，而不是一邊給時間，一邊成為網(wǎng)球選手，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 本題考查的是分詞作狀語。the person和interview是被動關(guān)系，并強調(diào)和前一動作“take down notes”同時進行，所以選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 本句測試with介詞短語引導的分詞獨立主格。with后面接復合賓語。因為賓語the flowers和賓語補足語之間是邏輯的主動關(guān)系。因此用現(xiàn)在分詞。因此B為正確答案。本句的意思是：“到處鮮花盛開，公園非常美麗�！�

　　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。本題考查固定搭配及非謂語的時態(tài)。came close to doing是固定搭配。而being killed和won之間無先后順序。

　　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。本題考查的是非謂語ing表示伴隨狀態(tài)。改變名字的同時就在想不讓別人發(fā)現(xiàn)自己以前做了什么。由于非謂語think這個動作，與謂語動詞change同時發(fā)生，因此選擇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)，因此選D。He spent his life writing the book.他花一生的時間寫這本書。He spends more time on sports than on studies. 他花在體育運動上的時間比花在學習上的時間多。