We can easily become unhappy_____ we work out our problems in our daily life.
| A．after | B．if | C．until | D．unless |
Qomolangma is _______ high _______ very few people can climb up to the top of it.
| A．so, that | B．enough, to |
| C．too, to | D．as, as |
–Whose is this purple scarf?
–It _______ be Mary’s. She always wears a purple scarf like this.
| A．must | B．can |
| C．mustn’t | D．can't |
Please _______ spend too much time playing computer games. It wastes a lot of time.
| A．not | B．aren’t |
| C．don’t | D．not to |
–Victor, could you please speak more _______ so that everyone can understand you?
–OK.
| A．heavily | B．widely | C．hardly | D．slowly |
It’s not easy to learn a foreign language, but I will never _______.
| A．put on | B．turn off |
| C．give up | D．try out |