—What should I do, doctor?
—You should take more exercise ______ healthy.
| A．to keep | B．keep | C．keeping | D．kept |
Jet Li to Guangzhou for charity . He’ll come back in two days.
| A．goes | B．has been | C．has gone | D．will go |
--- Doctor, ________ should I take this medicine? --- Twice a day.
| A．how often | B．how much | C．how soon | D．what time |
The Math problem is too difficult , we really don’t know ________ to do it .
| A．which | B．where | C．what | D．how |
---What do you think of ______Bai Yansong?
---He is _______ good host（主持人）that I like his program very much .
| A．a ; an | B．/ ; the | C．/ ; a | D．the ; a |
---Excuse me. Is the library open all day?
---. Only from 8 a.m. to 4 p.m.
| A．Yes, of course | B．That’s right |
| C．Sorry, I’m not sure | D．Sorry, I’m afraid not |