问题
选择题
When you are at home，give a call to let me know you safely．
A．are arriving
B．have arrived
C．had arrived
D．will arrive
答案
答案：B
题目分析：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。