1、知道水循环的概念
20.We tried to ______ his doubts and let him tell the truth.
A.replace B.review C.remove D.rebuild
解析:此题考查动词辨析。replace“放回原处;取代”;review“再检查;回顾;复习”;remove“去掉;脱掉;除名”;rebuild“重建”。根据句意此处应用remove表示“消除疑虑”的意思。
答案:C
19.-The cars give off a great deal of waste gas into streets.
-Yes.But I’m sure something will be done to ______ it.
A.reduce B.remove C.collect D.warn
解析:此处为采取措施“减少”废气排放。
答案:A
18.-Why was he fined?
-He happened to ______ flowers in the park.
A.be seen step on B.be seen picking C.be caught to pull D.catch damaging
解析:本题考查动词辨析以及非谓语动词的语态。根据句子的意思分析,此处应该使用被动。A项的step on作be seen的宾补时,不能用原形;C项的结构应该为be caught doing sth.。
答案:B
17.The bird flu ______through Asia has jumped from birds to humans at least 20 times so far,______16.
A.sweeps;killed B.swept;killing
C.sweeping;to kill D.sweeping;killing
解析:本题考查非谓语动词作定语和伴随状语的用法。第一个空用现在分词作定语,相当于谓语动词为主动的定语从句结构;第二个空为非谓语动词作伴随状语,表示和has jumped同时发生的动作。
答案:D
16.Though bought ten years ago,the car is still in good ______.
A.situation dition C.position D.station
解析: in good condition在此处表示“状况很好”的意思。
答案:B
15.-Is it for two months ______ they have stayed here?
-No,it is only three weeks ______they arrived here.
A.that;since B.that;when C.when;that D.since;before
解析:从第一句话的句子结构和句子的意思分析,此句应是强调句型,被强调的内容为:for two months,所以用that引导。第二句的结构为:It is+ 一段时间+since,意思为“……已经多久了”。
答案:A
14.-I really appreciate______ time to relax.
-I don’t doubt ______ able to do so.
A.to have;you to be B.having;that you being
C.to have;you are D.having;that you are
解析: appreciate后跟v.-ing形式作宾语。
答案:D
13.You must try some of her home-made wine.It’s quite an unforgettable ______.
A.experiment B.experience C.effort D.skill
解析:本句话的意思为“尝一下她自家酿造的葡萄酒是一次难忘的经历”。
答案:B
12.A cook will be immediately fired if he is found ______in the kitchen.
A.smoke B.smoking C.to smoke D.smoked
解析:本题考查非谓语动词的用法。根据句意和“find”动词的用法要求,此题的正确答案应为B。
答案:B
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