4. ________ ________ (一般来说), the warmer a place is, the more types of plants and animals it will usually support.

5. The young man ________ ________ ________ ________ ________ ________ (把自己冒充成商人) and cheated many people out of their money.

Part 2 Learning about Language

用括号内动词的正确形式填空。

1. There are some health problems that, when not ________ (treat) in time, can become bigger ones later on.

2. ________ (look) back on all those difficult times in the past, Ivy could not help but let out a sigh.

3. The housekeeper had come out of her room, ________ (attract) by the violent ringing of the bell.

4. Mr. Smith shook his head as though ________ (lose) in wonder and admiration.

5. The boy hurried home only ________ (find) his father had left.

6. ________ (see) from this angle, the matter is not as serious as people generally suppose.

Part 3 Using Language

I. 根据下面各句句意以及所给单词的首字母或汉语提示词，写出该单词的正确形式（每空一词）。

1. These trousers are a bit tight around my w________.

2. She began to ________ (啜泣) again, burying her face in the pillow.

3. Linda looks ________ (寒酸的) standing next to Andrea in her fashionable clothes.

4. Well, you want $400 and I say $300, so let's c________ on $350.

5. He's so friendly that people are prepared to o________ his faults.

II. 根据括号内的汉语提示补全下面句子（每空一词）。

1. The noise gradually ________ ________ (逐渐消失) and the whole city was in complete silence.