Only when one loses freedom _______its value .
A. does one know B. one does know C. does know one D. know one does
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
