Pollution has become a serious problem in almost all the big cities of the wo

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问题 Pollution has become a serious problem in almost all the big cities of the world. City people are becoming more and more worried about how they can (11) pollution. They are also concerned about whether the government is doing enough to (12) the e [br]

选项

答案 protect

解析这里是动词不定式表示目的，意为“保护 (环境) ”。

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Pollution has become a serious problem in almost all the big cities of the wo

SanFranciscohasbeencalledoneofthemostbeautifulcitiesintheworld.

SanFranciscohasbeencalledoneofthemostbeautifulcitiesintheworld.

SanFranciscohasbeencalledoneofthemostbeautifulcitiesintheworld.

Becauseofserious(ill)______,Tomwasnotabletobepresentattheclass.illn

Thisproblemneeds(discuss)______further.discussing/tobediscussed本题考查非谓语动词的

Myparentsarenotusedto______(live)inbigcities.living本题考查固定的短语搭配。考查的短语为：

Bythelate1970s,manyshoppingmallshadalmostdevelopedintosmallcitiesth

______inthought,healmostranintothetreeinfrontofhim,A、LostB、LosingC

REA’sProblemSolverBooks•Designedtosavestudent

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Fireantsinterlocktheirlegstogetherto______.[originaltext]Fireantsli

[originaltext]InthesunlitlibraryatJorgePrietoElementaryonChicago’s

关于矢量图形的说法中，错误的是（）A.由数学形式的线条组成，清晰度不受控制 B

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患者，76岁，在全麻下行胃大部切除术后，术毕入麻醉恢复室，1小时后意识恢复，但呼

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