The mail receiver will be asked to show his identify card wen ____the delivery 空里应填1.getting...
问题描述：
The mail receiver will be asked to show his identify card wen ____the delivery 空里应填1.getting...
答
when getting_the delivery 是带连词的分词短语作时间状语的.=when he or she gets the delivery
再如：
Be careful when crossing the road.有4个选项1.getting 2.gets3.toget 4.willget选第几个1