试题与答案

—May I speak to Mr.Smith? —I am afraid n

题型:选择题

题目:

—May I speak to Mr.Smith?

—I am afraid not.He is at a meeting now.It's not ________.

A.reliable

B.convenient

C.beneficial

D.available

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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