单项选择题

——Will you be in the office next week?——（）

A.My office is on the third floor.
B.Yes, I'll be here Tuesday through Thursday.
C.No, they're too weak to be useful.

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热门试题

单项选择题

A.The waiter said he'd bring me another.
B.Really? He said they were inside the desk.
C.Oh? I wasn't expecting them until three.

多项选择题

A.机械危险源
B.电气危险源
C.振动危险源
D.人及其环境引起的危险源