The number of chairs in the room __ ten. I’m afraid a number of chairs in the room ___ lost.
| A．is; is | B．is; are | C．are; is | D．are; are |
I asked the doctor for some _________.
| A．advice | B．advices | C．advise | D．advises |
Well, if you take this medicine __________, you’ll be better soon.
| A．third time one day | B．three times a day |
| C．third time a day | D．three times every day |
---Do you mind my smoking here?
---_________, Look at the sign. It says, “No Smoking.”
| A．It doesn’t matter. | B．No, I don’t. |
| C．You’d better not. | D．Never mind. |
A number of tourists _________ Yangzhou many times because it is such a beautiful city.
| A．has been to | B．have been to | C．has gone to | D．have gone to |
We _________ six days a week, but now we only work five days.
| A．used work | B．are used to work |
| C．used to working | D．used to work |