【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)爭中當醫(yī)生很艱苦,不是嗎? 本題為反義疑問句,working動名詞,在句中作主語,看作單數(shù),根據(jù)主語一致性原則,排除選項A.B.;hard形容詞,艱苦的,根據(jù)語法知識,“be+形容詞,在句中構(gòu)成系表結(jié)構(gòu)可知,此處選用be動詞,而不是助動詞dodoes,所以排除選項D.。故選:C。

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