---How long have you known the doctor ?
---_________he helped me three years ago.
A. When B. Before C. Because D. Since
---Never t
ouch
my computer while I’m away．
--- Sorry, __________.
A．I shouldn’t B．I mustn’t C．I won’t D. I don’t
---We had a football match with No. 15 Middle School yesterday.
---________. I missed it.
A. What a pity! B. I’m afraid.
C.I don’t think so. D. I’m sorry to hear that.
---How did the accident happen?
---You know, it ________difficult to see the road clearly because it_________.
A. was; was raining B. is; has rained
C. is; is raining D. will be; will rain
---My house is very near a busy street.
---It ________ be very quiet.
A. can B. must C. mustn't D. can’t
The sign on the right tells us taking photos ________here.
A. is allowed B. isn’t allowed C. are allowed D. aren’t allowed
