题目内容
The postman comes at 6:30 in the morning, ____ time I am usually fast asleep.
| A.when | B.at which | C.which | D.that |
B
考查定语从句。句中先行词为at 6:30 in the morning,故用介词at + which。句意:邮寄员每天早上6点半来,那时我通常在熟睡。
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