山东德州2016届高考英语二轮复习单项填空精练精析34

　　1. Desertification is a _______ that happens when land becomes desert because of climate changes and because people cut down trees and dig up grass.

　　A. progress

　　B. process

　　C. period

　　D. access

　　2. I can’t help but _______ very concerned.

　　A. feeling

　　B. to feel

　　C. feel

　　D. felt

　　3. We were more _______ the reporters working in Libya. Their lives were threatened at any time because of the war.

　　A. curious about

　　B. particular about

　　C. concerned about

　　D. crazy about

　　4. You have to do a lot of physical exercise to build up your _______ .

　　A. force

　　B. strength

　　C. power

　　D. energy

　　5. [2012潍坊模拟]When people cut down big trees，new trees should be planted. _______ they will have no trees to cut down in the future.

　　A. If not

　　B. If so

　　C. If no so

　　D. If don’t

　　6. [2012丹东模拟]While prices are rising so fast, many people are working out ways to _______ down their expenses.

　　A. cut

　　B. put

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