Farmers here _________keeping the soil rich and _________diseases.
| A．focus on…free of | B．center … free from |
| C．attend on… free of | D．depend on… free from |
What I need is book that contains ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a; the |
---Have you read the book?
---Yes. But that one is _____worth reading. I suggest you______ it if you have time.
| A．best; read | B．well; read | C．better; read | D．more; should read |
_____the problem of land erosion getting more serious, the government is searching for a way to deal with it.
| A．As | B．With | C．When | D．If |
---Did you visit the temple?
---No. We _____it, but we spent too much time shopping.
| A．could have visited | B．could visit |
| C．needn’t have visited | D．mustn’t have visited |
---I’d like some apple juice.
---Sorry, there is ______left. What about some other drink?
| A．nothing | B．no | C．none | D．not many |