Question

We ________ for the bus half an hour, but it has not come yet．

[　　]

A．

have been waiting

B．

have waited

C．

are waiting

D．

have been waited

Answer 1

答案：A
解析：

根据题意“等车”，这一动作从过去某一时刻持续到现在，还可能持续下去。