问题补充：
He has promised me that upon my return he for me at the airport.
A. is waiting
B. will be waiting[
C. will have waited
D. waits
答案：
A. is waiting
(答案→)B. will be waiting[
C. will have waited
D. waits
解析：考查时态。句意：他已经答应我了，我一回来他就会在机场等着我。所以应用将来进行时态。选B。
