—Do you smoke?
—No，I don’t.It’s two years since I __________.
| A．smoked |
| B．have smoked |
| C．has smoked |
| D．don’t smoke |
A new_____ bus service to Tianjin Airport started to operate two months ago．
| A．normal | B．usual | C．regular | D．common |
----Do yon have a minute? I’ ve got something to tell you．
-----0K．______you make it short．
| A．now that | B．if only | C．so long as | D．every time |
Scientists are convinced--- the positive effect of laughter___ physical and mental health．
| A．of；at | B．by；in | C．of；on | D．on：at |
---I think he is taking all active Dan in social work． ---I agree with you ________ ．
| A．in a way | B．On the way | C．by the way | D．in the way |
The news of the mayor’s coming to our school for a visit was ____ on the radio yesterday．
| A．turned out | B．found out | C．given out | D．carried out |