I __ at the bus stopfor 20 minutes when the bus finally came.

问题描述:

I __ at the bus stopfor 20 minutes when the bus finally came.
A had waited B was waiting C would wait D wait

A因为车开过来一句是过去时,而我等车又是在车开过来之前,即过去的过去,所以用过去完成时⊙▽⊙可追问蟹蟹评价