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第一节: 单项填空(共15小题；每小题1分, 满分15分)
从A、B、C、D四个选项中, 选出可以填入空白处的最佳选项
21. -Thanks for helping me with this difficult maths problem.
-____. That’s what a close friend should do.
A. Nothing serious B. All right C. Never mind D. Forget it.
22. Rainforests __ and burnt at such a speed that they will disappear from the earth in the near future .
从A、B、C、D四个选项中, 选出可以填入空白处的最佳选项
21. -Thanks for helping me with this difficult maths problem.
-____. That’s what a close friend should do.
A. Nothing serious B. All right C. Never mind D. Forget it.
22. Rainforests __ and burnt at such a speed that they will disappear from the earth in the near future .
