31．—Can you tell me what time the flight

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问题选择题

31．—Can you tell me what time the flight to Detroit leaves?

—I'm sorry, but it ______．

A．has been canceled

B．had been canceled

C．has canceled

D．had canceled

答案

答案：A

单项选择题

( ) your price is the only solution to the dilemm

a.A. Putting downB. Take downC. Let downD. Bringing down

单项选择题

在预制钢筋混凝土板上铺设找平层前，当板缝底宽大于（）mm时，应按设计要求配置钢筋

A.30

B.40

C.50

D.60