问题补充:
Tell me when you at the airport, Alice. I’ll go there to meet you if I’m free.
A. arrive
B. would arrive
C. have arrived
D. are arriving
答案:
A. arrive
B. would arrive
C. have arrived
(答案→)D. are arriving
解析:考查短暂性动词的进行时表示将要做某事,when当…时候,由后面的句子可以知道还没有到机场,句意“告诉我你将什么到机场,如果我有空的话,我将去接你”,所以选D