【练习】根据句子意思用glare，stare，glance的适当形式填空。

1). She _______ shyly at him and then lowered her eyes.

2). The two boys _______ at each other before they fought.

3). My father_______ at the stranger for a long time as if they had known each other before.

Keys: 1). glanced 2). glared 3). stared Ⅱ.词形变化（旨在提供语法填空所需材料）

1. health n. 健康 healthy adj.健康的；有益健康的 healthily adv. 健康地 2. sugar n.糖 vt.在......中

　加糖 sugary adj. 甜的，含糖的；甜言蜜语的 3. curiosity n. 好奇心 curious adj. 好奇的 curiously adv. 好奇地 4. weakness n.虚弱，衰弱，

软弱；弱点，缺点 weak adj.虚弱的；(能力等)差的；微弱的 weaken v.(使)变弱，(使)减弱 5. strength n. 力气；长处 strengthen vt. 加强；

巩固 strong adj. 强壮的；牢固的 6. digest vt.消化；吸收，领

悟 n.文摘 digestion n.消化(力) digestive adj.消化的，易消化的 7. benefit v.& n. 有益于；

　得益于；利益，好处 beneficial adj. 有益的 【练习】用括号内所提供词的适当形式填空。

1). You look much ________ (health) than before.

2). The boy had burning ________ (curious) about what was going on.

3). The government decided to take some measures to _________ (strength) the economy.

4). Fresh air is ________ (benefit) to one' s health.

5). Mike was the ________ (strength) boy in his class.

6). It' s that ________ (sugar) smile of his that I can' t bear - it makes me want to puke!

7). It' s important to know your own strengths and ________ (weak).

8). Vegetables are usually cooked to aid ________ (digest).

Keys: 1). healthier 2). curiosity 3). strengthen 4). beneficial 5). strongest

6). sugary 7). weaknesses 8). digestion

Ⅲ.重点词汇（旨在提供词汇综合运用材料）

1. balance n. 天平，平衡；余额，余数 v. 平衡；权衡 balanced adj. 均衡的

[典例]

1). Try to achieve a better balance between work and play. 争取把工作和娱乐更好地结合起来。

2). I must check my bank balance (= find out how much money I have in my account).

我要核对一下我在银行的余额（看我的帐户上有多少钱）。

3). Try to balance your diet by eating more fruit and less protein. 多吃些水果, 少摄入些蛋白质, 使饮食均衡合理。

[重点用法]

a balanced diet 均衡的饮食 keep the balance of nature保持生态平衡

keep one' s balance保持平衡 lose one' s balance (= be out of balance) 失去平衡