Failure is never pleasurable, but it can make a positive contribution to your life ____ you learn to use it.
| A．since | B．once | C．until | D．unless |
I’ll go to the party with you ________ you don’t wear those strange trousers.
| A．as though | B．in order that | C．in that | D．providing |
He prefers to live ________ there is fresh air and sunshine.
| A．in which | B．where |
| C．the place where | D．there where |
The teacher talked with Jack, _______ problems was poor study habits.
| A．whose | B．which |
| C．one of whose | D．one of which |
It will really make no difference ________ he doesn’t come tonight.
| A．if | B．whether | C．that | D．what |
---Excuse me, Miss. May I share your table?
---Of course. _________.
| A．Not at all | B．Be my guest |
| C．I don’t mind | D．I’m with you on that |