—May I speak to Mr.Smith?—I am afraid not.He is at a meeting now.Its not .A. reliableB. c

问题补充：

—May I speak to Mr.Smith?

—I am afraid not.He is at a meeting now.Its not .

A. reliable

B. convenient

C. beneficial

D. available

答案：

A. reliable

(答案→)B. convenient

C. beneficial

D. available

解析：B句意：“我可以和史密斯先生讲话吗？”“恐怕不行，他现在正在开会，不太方便。”A：可靠的；B：方便的；C：有益的；D：可利用的，可得到的。

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