The bike hit the tree ______ I could get off.
A when B before C until D while
．A computer is so useful a machine ________ we can use everywhere．
| A．that | B．whic h |
C．as | D．what |
He ________ the window of our classroom yesterday because he didn’t come to school．
| A．mustn’t have broken | B．mightn’t have broken |
| C．shouldn’t have broken | D．couldn’t have broken |
Mary had promised to give me a ticket for tomorrow．She failed, ____．
| A．either | B．though | C．but | D．too |
Mom promised to buy me a nice gift for my birthday , _____ beyond my imagination．
| A．which | B．that | C．something | D．the one |
The prize of the game show is ＄30,000 and an all expenses _______ vacation to China．
| A．paying | B．paid | C．to be paid | D．being paid |