You are sure to fail the test _________ you spend more time doing something helpful.
| A．because | B．but |
| C．when | D．unless |
A Wechat（微信）is an invention ________can help people talk to friends，share photos，ideas and feelings freely .
A. which B. who C. /
—Is that Kate’s car?
—It ______be hers. She has just gone for a meeting.
A. can’t B. may C. mustn’t
—______will you stay here for the meeting?
—For two days.
A. How long B. How often C. How much
—What are the two _________ doing?
—They are taking care of several ____________.
A. German; sheeps
B. Germen; sheep
C. Germans; sheep
—What do you think of her skating?
—Oh, no one does _________.
A. good B. well C. better