You will achieve nothing _____ you work hard
| A．unless | B．when | C．if | D．that |
About 75% percent of the students can go swimming the rest can’t.
A. while B. and C. or
--Where's Mr. Green?
--Oh, he _________ Canada.
A. has been to
B. has gone to
C. went to
— Thank you for your help — __________.
| A．Don’t thanks. | B．You’re right. |
| C．You’re welcome. | D．I’m OK. |
---Let’s play ping-pong.
---No, it’s ___________. I want to play basketball.
| A．interesting | B．fun |
| C．relaxing | D．boring |
I lost my tape players. I ________ find them.
| A．must | B．am |
| C．not | D．isn’t |