—Look！Somebody ________ the sofa.
—Well，it wasn't me.I didn't do it.(2012·江西)
| A．is cleaning | B．was cleaning |
| C．has cleaned | D．had cleaned |
When a question ________at the meeting, no one could answer it.
| A．rose | B．raised | C．came | D．arose |
The River Nile _______ flood large areas, but now the water of it _______ produce electricity.
| A．used to, is used to | B．used to, used to | C．is used to, is used to | D．is used, to used to |
. I shall never forget the day ____ we first visited the beautiful school.
| A．where | B．when | C．in which | D．which |
They are talking so warmly and it looks ___ they had been old friends.
| A．even if | B．if | C．as though | D．as |
. Nowadays people attach importance _______ the children’s pre-school education.
| A．to | B．in | C．of | D．about |