问题补充:
When you are at home,give a call to let me know yousafely.
A. are arriving
B. have arrived
C. had arrived
D. will arrive
答案:
A. are arriving
(答案→)B. have arrived
C. had arrived
D. will arrive
解析:考查时态:句意:当你到家后,给我个电话让我知道你已经到家了。When you are home是现在时,而主句give a call to let me know 是现在是时,因此其宾语从句也应该与其保持一致用现在时you have arrived safely 选B。