21.（2009上海）Bill suggested __________ a meeting on what to do for the Shanghai Expo during the vacation.
A. having held B. to hold C. holding D. hold
答案：C
解析：本題考查非謂語動詞。句意“Bill建議舉行一個會議，討論在假期中為上海世博會做些什么”，動詞suggest表示“建議”時，搭配的賓語應(yīng)該為動名詞形式，故選C。

22.（2008天津）__________ their hats into the air, the fans of the winning team let out loud shouts of victory.
A. To throw B. Thrown C. Throwing D. Being thrown
答案：C
解析：考查非謂語動詞。句意：獲勝隊的粉絲們將帽子扔到空中，發(fā)出勝利的呼喊。主語the fans與throw之間是邏輯上的主動關(guān)系，并與let out同時發(fā)生，故用v. –ing形式.

23.（2008江西）I hear they’ve promoted Tom, but he didn’t mention __________ when we talk on the phone.
A. to promote? B. having been promoted? C. having promoted? D. to be promoted
答案：B
解析：考查非謂語動詞。句意：我聽說他們提拔了湯姆，但我們在電話中交談的時候，他并沒有提到自己被提拔了。動詞mention后接-ing分詞，且promote的動作發(fā)生在mention之前，因此用-ing分詞完成式的被動語態(tài)符合句子的要求。

24.（2008湖南）The trees __________ in the storm have been moved off the road.
A. being blown down? B. blown down? C. blowing down D. to below down
答案：B
解析：根據(jù)the trees與blown down的關(guān)系可知，the trees只能是被blown down，于是排除選項(xiàng)C、D；而選項(xiàng)A(being blown down)表示一種正在進(jìn)行或經(jīng)常發(fā)生的、習(xí)慣性的行為；選項(xiàng)B(blown down)表示一種被動和已經(jīng)完成的動作。根據(jù)句子語境可知，表示動作被動的結(jié)果，答案是B。

25.（2008陜西）__________ around the Water Cube, we were then taken to the Bird’s Nest for the 2008 Olympic Games.
A. Having shown B. To be shown C. Having been shown D. To show
答案：C
解析：考查非謂語動詞。此處是非謂語動詞作狀語，邏輯主語是句子的主語we。非謂語動詞的邏輯主語之間是被動關(guān)系，而且根據(jù)句意可知，非謂語動詞表示的動作在謂語動詞所表示的動作之前已經(jīng)完成，故選C。

26.（2008四川）We had an anxious couple of weeks __________ for the results of the experiment.
A. wait B. to be waiting C. waited D. waiting
答案：D
解析：考查非謂語動詞。后半句是-ing分詞短語作伴隨狀語。句中的had是實(shí)義動詞，因此A、C兩項(xiàng)的語法上不正確；B項(xiàng)表示“將要等待”，不符合語境。

27.（2008重慶）__________ to reach them on the phone, we sent an e-mail instead.
A. Fail B. Failed C. To fail D. Having failed
答案：D
解析：考查非謂語動詞。我們先前沒有打通電話，所以只能發(fā)郵件（給他們了）。前面所說的事情已經(jīng)發(fā)生，所以用having done的形式。

28.（2008浙江）__________ that he was in great danger, Eric walked deeper into the forest.
A. Not realized B. Not to realize C. Not realizing D. Not to have realized
答案：C
解析：句意：由于沒有意識到自己身處險境，Eric朝森林身處走去。此處是-ing分詞的否定形式作原因狀語，Eric與realize之間是主動關(guān)系。不定式通常作目的狀語，因此B、D兩項(xiàng)不正確。

29.（2008福建）__________ in the queue for half an hour, the old man suddenly realized he had left the cheque in the car.
A. Waiting B. To wait C. Having waited D. To have waited
答案：C
解析：考查非謂語動詞。此處非謂語動詞引導(dǎo)的句子作時間狀語，邏輯主語是句子的主語the old man，非謂語動詞與邏輯主語之間是主動關(guān)系，且wait這個動作在謂語動詞的動作發(fā)生之前已經(jīng)發(fā)生了，故用v.-ing的完成式，選C。

30.（2008江蘇）To learn English well, we should find opportunities to hear English __________ as much as we can.
A. speak B. speaking C. spoken D. to speak
答案：C
解析：考查非謂語動詞。spoken在句中充當(dāng)English的補(bǔ)足語。