[题目]We all know that a smile is usually a sign people feel friendly and happy.A. whenB. howC. that D. if 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】We all know that a smile is usually a sign ________ people feel friendly and happy.

A. whenB. howC. that D. if

【答案】C

【解析】

试题分析：考查同位语从句和连词。句意：我们知道微笑通常是一个人感到友好和愉悦的标志。sign是先行词，people feel friendly and happy是解释说明sign的内容，而且从句中意思完整，不缺成分，故用that来引导。故选C项。

练习册系列答案

A. leavesB. would leaveC. will have leftD. is leaving

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A. in order that heB. so that she won’t

C. so as not toD. intending to

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A. whatB. howC. that D. which

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A. burst into B. broke into C. burst out D. broke out

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A.Brought up
B.Bring up
C.Being brought up
D.Having brought up

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A. To keep B. Keeping

C. Keep D. Having kept

【题目】To get evidence of the murder, the police ________ the whole house ________.

A. made, search forB. had, searched

C. made, searched forD. had, searching

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