题目内容
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 |
B
解析试题分析：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。
考点：考查时态
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