The host told a joke at the party and made the guests ______ a lot．（ ）
| A． |
laugh |
B． |
laughing |
C． |
to laugh |
D． |
laughed |
——He can write well.
——He_____, but he doesn’t. He’s too lazy.
| A．must | B．mustn’t |
| C．can | D．can’t |
Rick has learned a lot about Chinese culture _____ he came to China.
| A．before | B．when |
| C．until | D．since |
--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 |
Be quick, we’ll be late for the meeting.
| A．and | B．but |
| C．so | D．or |
I still remember my first teacher __________ we haven’t seen each other for many years.
| A．for | B．because |
| C．since | D．Though |