I spend much money on books _____ I am not rich.
| A．but | B．so | C．even though | D．as if |
—Could I use your bike for today, Sam?
—_____. I’m not using it.
| A．Sure, go ahead | B．I have no idea |
| C．No, you can’t | D．Never mind |
—Will you stay for some more days?
—Sorry, I_____. My mother called to ask me to go back at once.
| A．mustn’t | B．may not | C．can’t | D．wouldn’t |
—Why didn’t you go to play football with us yesterday afternoon?
—I _____my mother with the housework then.
| A．helped | B．was helping | C．had helped | D．have been helping |
We can easily become unhappy_____ we work out our problems in our daily life.
| A．after | B．if | C．until | D．unless |
I’ll never forget the day_____ the great scientist came to our school and gave us a speech.
| A．that | B．which | C．when | D．where |