作业帮No letters ____from her since she went to work in Africahave been receivedhas been receivedreceivedare received哪个\?为什么
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/13 00:12:06
No letters ____from her since she went to work in Africahave been receivedhas been receivedreceivedare received哪个\?为什么
No letters ____from her since she went to work in Africa
have been received
has been received
received
are received
哪个\?为什么
No letters ____from her since she went to work in Africahave been receivedhas been receivedreceivedare received哪个\?为什么
我觉得是has been received
no letters谓语动词用单数