【題目】Working as doctors in wars _______ very hard, ________?

A. are, aren’t they B. do, don’t they C. is, isn’t D. does, doesn’t

【答案】C

【解析】

句意:在戰(zhàn)爭(zhēng)中當(dāng)醫(yī)生很艱苦,不是嗎? 本題為反義疑問(wèn)句,working動(dòng)名詞,在句中作主語(yǔ),看作單數(shù),根據(jù)主語(yǔ)一致性原則,排除選項(xiàng)A.B.;hard形容詞,艱苦的,根據(jù)語(yǔ)法知識(shí),“be+形容詞,在句中構(gòu)成系表結(jié)構(gòu)可知,此處選用be動(dòng)詞,而不是助動(dòng)詞dodoes,所以排除選項(xiàng)D.。故選:C。

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