If _____, please buy me a backpack while

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问题选择题

If _____, please buy me a backpack while you are at the supermarket.

A．you are convenient

B．it is convenient to you

C．it is convenient with you

D．I am convenient to you

答案

答案：B

选择题

We finished the job last night ,but it was already midnight _______I arrived home．

A．while

B．when

C．where

D．that

单项选择题

劳力型心绞痛，疼痛常发生于（）

A.吵架后

B.睡眠时

C.吸烟时

D.劳累与情绪激动时

E.安静休息时