四、词汇运用。

A)根据句意及汉语提示写单词完成句子。

31.This kind of machine has many advantages(优点)，it can help us do things quickly and well.

32.I've run out of the money，so I can't afford(买得起) the coat.

33.We can save trees by recycling(回收利用) the paper.

34.On the way to success，lots of difficulties must be overcome(战胜).

35.You should write the answer on another piece of seperate(单独的) paper.

B)用括号里所给词的适当形式填空。

36.The wooden(wood) desk sells very well in the store.

37.The strong and changeable light is harmful(harm) to human's eyes.

38.Have you learnt something about environment protection(protect)?

39.The teacher speaks loudly so that the students can hear her clearly(clear).

40.The people in the village are very thankful(thank) to these volunteers.