—I’m sorry but the boss isn’t here yet. Shall I have him call you when he comes back?—No

问题补充：

—I’m sorry, but the boss isn’t here yet. Shall I have him call you when he comes back?

—No, I’ll call him back. If I call again in half an hour, do you think she ?

A. had arrived

B. has arrived

C. will arrive

D. will have arrived

答案：

A. had arrived

B. has arrived

C. will arrive

(答案→)D. will have arrived

解析：一般将来时表示将要发生的动作，而将来完成时表示将来某个时间之前已经发生或完成的动作。根据语境可知是强调将来的结果，应用将来完成时。