---______will you be back to the office?
---In half an hour.
| A．How often | B．How long |
| C．How far | D．How soon |
—Would you mind turning down the music?
—.
| A．Yes, I would | B．No, of course | C．No, not at all | D．Yes, of course |
Last year I _________ drive. I used to take the bus.
| A．could | B．couldn’t | C．should | D．shouldn't |
These days my classmates are busy ________ ready for the final exam.
| A．to get | B．get | C．getting | D．got |
There’re too many clothes in the shop. I really can’t decide .
| A．which to buy coat | B．to buy which coat |
| C．which coat should I buy | D．which coat to buy |
Mary prefers _______ to ________ .
A. sing, dance B. sing, dancing C. singing, dancing