---I am going to Nanjing and stay there for a week.
---____________ you are there, would you please buy some books for me?
| A．If | B．While | C．Since | D．As soon as |
— _______ will you stay in Shenzhen for your summer vacation?
— For about two weeks.
| A．How far | B．How often | C．How soon | D．How long |
— Must I return the book tomorrow?
— No, you ________. You can keep it for three days.
| A．mustn’t | B．needn’t | C．can’t | D．may not |
Three fourths of the ________ in the country have run out.
| A．water | B．book | C．forests | D．news |
I don’t know _________ the problem.
| A．how deal with | B．how to deal with |
| C．what to deal with | D．what do with |
Hainan is a very good island. It’s the second ________ island in China.
| A．largest | B．large | C．larger | D．most large |