The police ________ looking for the lost dog at the station.
A.is B.was C.are
We should turn off the lights ________ we leave the room.
A.where B.while C.as soon as
The music is too loud, would you mind ________?
A.turn it down B.turning it down C.turning down it
— Where is my MP5 player, Lucy?
— I don't know. It isn't here. Maybe ________ took it.
A.somebody B.nobody C.anybody
I didn't know Jack's address ________ he wrote to me.
A.because B.when C.until
— Need I finish my homework today?
— Yes, you ________.
A.need B.can C.must
