4. He has a small ___(锋利的)knife.

5. One major problem involves the ____(毁坏)of local drinking water systems.

6. Of course wealthy people can be ______(大方的)after they become rich.

7. The weather is ________(变化莫测的)and can change in an instant.

8. The letter __________ _________ _________ the mentality of his former friend.

这封信透露了他先前的朋友的心理状态。

9. Her forgetfulness is ________ _______ advancing age.

她由于年事已高而变得健忘。

自练自提

【过关小练】单词拼写

1. I had the good ____________(运气)to work with a brilliant head of the department.

2. Bob died of a heart ______________(袭击), brought on by his lifestyle.

3. A red sky at night _______________(暗示)fine weather the following day.

4. She's always very _______________(大方的)to the kids. gkstkgkstkgkstkgkstk]

5. The floods brought death and _______________(毁坏)to the area.

6. Our eyes slowly ______________(适应)to the dark. gkstkgkstkgkstk.Com]

7. Jackson remained _____________(镇定的)and always master of his passions.

8. It seems highly _________________(不可能的)that she ever existed.

【过关小练】完成句子

1. As we are familiar with each other, let's __________ _______ _________ ________ __________.

　大家都是熟人, 我们就开门见山吧。

2. His chest _________ _______ when he breathed in deeply.

　当他深呼吸时, 胸部突了出来。

3. Elephants would _________ _________ soon if men were allowed to shoot as many as they wish.

　如果人类可以如愿地射杀掉大量大象, 那么大象将会很快灭绝。