Well let you use the room ______you keep it clean and tidy .
A. even though B. on condition that C. if D. however
Is this the research center _____you visited the lab last year ?
A. which B. the one C.that D. where
Don’t believe him .He is just _____ an excuse .
A. making out B. making up of C. making up D. making from
-Would you mind if I take the seat?
- .
A.Yes, sit down, please B.Surely, never mind
C.No, not at all D.No, you can’t take it
The bell rang and came in Mr.Brown, a book in his hand. Then the class began.
A.for B.when C.with D.while
In the past 5 years a great deal of money _____ improving the environment of the school.
A. is spent B. has been spent C. was spent D. had been spent