题目内容

When you are at home，give a call to let me know you            safely．
A．are arrivingB．have arrived
C．had arrivedD．will arrive
B

试题分析：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。
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