Burglar alarms ________ at any time of the day or night serve only to annoy.

A．go offB．that are going of
C．that go off D．which going off

C

解析試題分析：通過(guò)分析句子結(jié)構(gòu)，其中包含一個(gè)定語(yǔ)從句，根據(jù)at any time of the day or night可知，應(yīng)該使用一般現(xiàn)在時(shí)，故選C。
考點(diǎn)：定語(yǔ)從句時(shí)態(tài)考查
點(diǎn)評(píng)：根據(jù)時(shí)間狀語(yǔ)及全句的意思，來(lái)判斷從句的時(shí)態(tài)，把握全句的意思至關(guān)重要。

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B

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