---Could you give me an explanation ______ your keeping silent throughout the discussion?
---Oh, terribly sorry. I had the least idea of what ________. I would have made a complete fool of myself if I had said anything.
| A．for; was discussed | B．of; had discussed |
| C．to; was being discussed | D．with; had been discussed |
Harry is _____ my neighbor. He is a good friend of mine as well.
| A．less than | B．at least | C．at most | D．more than |
Many students believe the choice of their universities should _______ their own interests.
| A．be based on | B．base on | C．be basing on | D．base at |
A teacher and artist ______coming to speak to us about painting tomorrow afternoon.
| A．is | B．are | C．was | D．were |
Two thirds of the buildings here ______ .
| A．need to repair | B．need repairing | C．needs to repair | D．needs repairing |
With time _______ by, he began making films.
| A．went | B．go | C．going | D．goes |