I don't remember when and where I ________ this book.
A.buy B.am buying C.will buy D.bought
They were doing homework when the telephone ________．
A.rings B.was ringing C.rang D.has rung
I haven’t finished reading the book. I ________it when I finish it.
A.return B.returned C.will return D.have returned
So many people are playing games in the park. They________ very happy.
A.will look B.have looked C.look D.looked
It's late, but Jenny hasn't come back yet. I ________ for her.
A.waited B.have waited C.am waiting D.was waiting
Maggie ________ that museum, so she knows it very well.
A.is visiting B.visits C.will visit D.has visited
