16.The big fire in Shanghai, believed to ________ due to the burning of construction materials, caused 58 deaths and destroyed all the belongings of the people there.

　　A. have occurred B. occur

　　C. have been occurring D. be occurring

　　[解析]句意：发生在上海的那场大火，据认为是由于建筑材料的燃烧造成的，导致了58人死亡，毁掉了那儿所有人的全部财产。It is believed that...，“据认为……，据相信……”，常可改成“主语+be believed+to do”结构，不定式有时态和语态的变化。由语境可知，occur 动作发生在谓语动词之前，故应用不定式的完成式，A项正确。

　　[答案]A

　　17.Little Tom admitted ________ in the shop, ________ that he wouldn't do that in future.

　　A. to have stolen; promising

　　B. stealing; promised

　　C. to stealing; promised

　　D. having stolen; promising

　　[解析]句意：小汤姆承认在商店里偷过东西，保证今后不会再干那事了。admit doing sth.“承认干过某事”，admit 只接动名词作宾语，排除A、C两项，又由句子结构可知，第二空为非谓语动词，主语 little Tom 与 promise 之间为主谓关系，故用现在分词作伴随状语，故D项正确。

　　[答案]D

　　18.The thinker, head in hand, ________ his right arm on his left knee, gained its current title when ________ in Paris in 1890.

　　A. rested; was exhibited

　　B. resting; exhibited

　　C. resting; exhibiting

　　D. being rested; being exhibited

　　[解析]第一空中动词 rest 和主语 the thinker 属于主谓关系，所以选择 resting;第二空中 exhibit 和主语 the thinker 属于被动关系，所以选择 exhibited。故答案为B。

　　[答案]B

　　19.Liu Xiang won the gold medal of men's 110m hurdles at the 16th Asian Games, ________ the title of the event with 13.09 seconds.

　　A. claimed B. claiming

　　C. has claimed D. to claim

　　[解析]句意：第十六届亚运会，刘翔赢得了男子110米跨栏金牌，以13.09秒的成绩获得(claiming)这个项目冠军。

　　[答案]B

　　20.______ a little money, Jane was able to buy her mother a lovely new watch.

　　A. To save B. Saving

　　C. Saved D. Having saved

　　[解析]句意：已经省下了一点钱，简能够给她妈妈买块可爱的新手表。主语 Jane 与 save 之间为主谓关系，并且 save 动作发生在谓语动词之前，故应用现在分词的完成式作状语，D项正确。

　　[答案]D

　　21.________ at the party, we saw Ruth standing alone in the corner of the hall.

　　A. Arriving B. To arrive

　　C. Arrive D. Arrived

　　[解析]句意：到达聚会，我们看到 Ruth 独自站在礼堂角落里。主语 we 与 arrive 之间为主谓关系，故用现在分词短语作状语。

　　[答案]A

　　22.In 2010, China enjoyed its best Winter Game results, ________ 11 medals in Vancouver—five gold included.

　　A. to collect B. collected

　　C. being collected D. collecting

　　[解析]句意：2010年，中国在温哥华获得了冬奥会的最好成绩——取得了11枚奖牌，其中包括5枚金牌。主语 China 与 collect 之间为主谓关系，故应用现在分词短语作状语，D项正确。

　　[答案]D

　　23.In the near future, China will increase supply of smaller houses, ________ to help low­income families to buy houses of their own.

　　A. aims B. being aimed

　　C. aiming D. having aimed

　　[解析]句意：在不久的将来，中国将提高小户型住房的供应，旨在帮助低收入的家庭自己买房。aim at“旨在，目的在于”，此处用现在分词短语作状语。

　　[答案]C

　　24.During the opening ceremony, “Miss Smile” has won the hearts of Chinese Internet users after being caught ________ the same smile for nearly 20 minutes.

　　A. fixed B. to be fixed

　　C. to fix D. fixing

　　[解析]catch sb. doing sth.“发现/撞见某人干某事”，此处为其被动形式 sb. be caught doing sth.，故D项正确。

　　[答案]D

　　25._______ their tennis rackets into the air, the players of the winning team let out loud shouts of victory.

　　A. Thrown B. Throwing

　　C. To throw D. Being thrown

　　[解析]句意：把乒乓球拍抛到空中，获胜队伍的队员发出了胜利的欢呼。主语 the players of the winning team 与 throw 之间为主谓关系，故应用现在分词短语作状语。

　　[答案]B