读某区域30年前和现在环境变化示意图，回答下列小题。
图示地区出现的主要环境问题是 （ ）
| A．水土流失 | B．土地荒漠化 |
| C．土壤盐碱化 | D．水污染 |
造成该问题的原因是（ ）
| A．过度砍伐森林 | B．过量引水灌溉 |
| C．过度开发沼泽 | D．城市化过度发展 |
该地森林资源的生态意义主要是（ ）
| A．保护耕地 | B．美化环境 | C．涵养水源 | D．保持水土 |
Since then I a member of the family and never from them.
| A．have be come; will I separate |
| B．have be come; I will separate |
| C．have been; will be separated |
| D．have been; I was separated |
---Will you please spare me a few minutes to accept my interview, Mr Yang Liwei now?
---________. But I’ll be free this evening. Would you mind?
| A．No, I don’t | B．Yes, with pleasure |
| C．I’m afraid not | D．Yes, I’d be glad to |
Some famous singers live on the _________ from their record sales.
| A．salary | B．value | C．bill | D．income |
The World Trade Organization (WTO) finally opened its door to China on November 10, ______ our Chinese 15-year wait.
| A．to end | B．ended |
| C．ending | D．ends |
Qingdao is _______ most beautiful coastal city and I think I’ll go there for _______ second time.
| A．a;a | B．the; a | C．the; the | D．the; a |