18. A new ___ bus service to Tianjin Airport started to operate two months ago .
| A．normal | B．usual | C．regular | D．common |
—I went to the beach and got plenty of rest.
—________. You looked tired last time I saw you.
| A．I had hoped so. | B．Really? |
| C．I'm glad you did. | D．That sounds a good idea. |
—Do you mind if I smoke here?
—________.
| A．Of course not.It's not allowed here |
| B．No，you can't |
| C．I'd rather you didn't actually |
| D．Great! I also like smoking |
Can those________at the back of the classroom hear me?
| A．seated | B．sit | C．seat | D．sat |
At the opening________of the school, our headmaster gave a short speech.
| A．ceremony | B．form | C．matter | D．event |
Sarah pretended to be cheerful，________nothing about the argument.
| A．says | B．said | C．to say | D．saying |