--Sorry, I overslept. I forgot to set the alarm.
--Your clock ________. Perhaps you should buy a new one.
| A．never worked | B．never works |
| C．had never worked | D．is never working |
I’m not sure about the meaning of the word. You’d better look it up in a ____ ．
| A．letter | B．dictionary | C．postcard | D．notice |
Trees ____ fight air pollution．They are natural air conditioners．
| A．should | B．must | C．need | D．can |
____ it snowed heavily yesterday, nobody in our class missed the lesson．
| A．Though | B．Because | C．Unless | D．Since |
Tomorrow there’s a programmed about our school on TV，then it ____ by millions of people．
| A．will see | B．saw | C．will be seen | D．was seen |
My brother is two meters in height．It’s very difficult to find clothes big enough ____ him．
| A．about | B．at | C．with | D．for |