单项选择题

变形缝区分不同材料以长度计算。（） A. 对 B. 错

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单项选择题

They use the __________ to handle the cargo.
A、winch
B、windlass
C、capstan
D、thruster

Black asked me, "Why haven't you left here yet?”Black asked me why _____________ yet.
A、I hadn't left there
B、I haven't left here
C、hadn't I left there
D、haven't I left here

答案： I hadn’t left there