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问题 选择题

He has never been late for class, _____ he?[ ]

A. is

B. isn't

C. has

D. hasn't

答案

答案：C

单项选择题

具有行血、补血功效的药物是（）

A.川芎

B.赤芍

C.鸡血藤

D.阿胶

E.茜草
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选择题

---  My sister is very upset today.

--- It is your fault. You ________________ the bad news to her yesterday.

A．should tell

B．should have told

C．shouldn’t tell

D．shouldn’t have told
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