—Hello may I speak to Mr Green please?—Sorry. He a meeting. Can you call him later?A.

问题补充：

—Hello, may I speak to Mr Green , please?

—Sorry. He a meeting. Can you call him later?

A. has

B. is having

C. will have

D. had

答案：

A. has

(答案→)B. is having

C. will have

D. had

解析：句意：你好，可以找格林先生接电话吗？——抱歉，他正在开会。你能稍后打电话给他吗？结合语境可知选B.