— I rang you up last night, but nobody answered.
— Oh, I usually ________ off my phone at about 9:00 p.m.
A．switchedB．have switched
C．switchD．had switched
C

試題分析：考查時態(tài)：句意：昨晚我打電話給你，但是沒有人接電話。--哦，我通常下午九點關(guān)手機。因為是通常做…，用一般現(xiàn)在時，選C。
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