Look, Tina is waiting _______ the bus stop. [ ]

You seem familiar with Mr. John?-Of course, we_______ together for three years in the 1990s.

Who would you rather ______ the report instead of you？

I didn’t know when he _____ back. He said he would call me when he _____ home.

Could you tell me ______ it takes to go from here to Beijing by air? —About 50 minutes.[ ]