My study of biology has ___C___ much of my spare time， but it has given me a great deal of enjoyment.

    A. taken off               B. taken down

C. taken up                D. taken away

 “Aha, you’re a chain smoker！” “Only at home. Nobody _______ that but you.”

    A. discovered            B. had discovered

C. discovers             D. is discovering

It’s good that we _____ to the park because it’s started to rain.

    A. don’t go           B. hadn’t gone

C. didn’t go          D. wasn’t going

I had expected to come over to see you last night, but someone ______ and I couldn’t get away.

    A. called  B. had called

    C. would call  D. would have called

.After the clock          twelve, the students walked out of the lecture room.

A. beat                 B. bit                    C. struck               D. rang

Is this all that you need？ If you married me, I’d give you everything you _____.

A. want           B. wanted      C. had wanted     D. are wanting

Our company will move to a tall building _______ has just been complete.

    A. which                B. when      C. how                  D. where

He told me that he had two girl-friends, neither of _______ knew anything about the other.

A. whom               B. them      C. which              D. who

The murder happened in an old building, beside ______ the city police station.

A. which are               B. it is      C. which is                D. them are

Don’t go to _____ places where there is no fresh air.

A. such   B. so

C. those   D. which