Studying in groups is necessary _________________ you want to do well in school.
| A．if | B．until | C．unless | D．though |
---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 |
Listen! The music sounds very _________.
| A．beautiful | B．delicious | C．well | D．wonderfully |
---My pen is missing. I can’t find it anywhere.
---I’m afraid you have to buy _________.
| A．it | B．one | C．any | D．few |