6. I’ve visited a lot of zoos in my life, and I have never seen one I liked or one that was suitable for animals to live in.

(1) be suitable for sb to do sth. 表示 “适合某人做某事”,这里suitable 是suit的形容词形式,表示 “合适的”.如:

This kind of bamboo is not suitable for pandas to eat.

这种竹子不适合给熊猫吃.

This dress suits you very much, but unfortunately it doesn’t fit you.

这套女装款式非常适合你,只可惜大小不合适.

(2)to live in 在此处作animals的后置定语. 英语中动词不定式短语做名词定语,放在后面.如:

There is nothing for us to worry about.我们没有什么可以担心的.

5. I’m writing to say that I am against building a new zoo in our town.

　Against 介词,反对,违反,与……相反(=opposite)如:

Are most people against the proposal?

大多数人反对这项提议吗?

Against 介词还有触,碰,倚,靠的意思.如:

Put the piano there, with its back, against the wall.把钢琴放在那里,背靠着墙.

Be against doing sth. 反对做某事,反义词组是 be for doing sth, 赞成某事.

如: All the people around the world are against cloning human beings.

　全世界的人民反对克隆人类.

All of us are for peace and against war.

我们都赞成和平,反对战争.

4. We’re trying to save the manatees.

　我们正在竭尽全力拯救海牛.

Try to do =try one’s best to do

努力去做某事。如：

Every student should try to study hard in order to study in a university.

为了进入大学学习，每个学生都应该努力学习。

2. How big are manatees? 海牛有多大？

How big... 询问体重。以how组合的疑问词组有很多，如：how old(询问年龄)，how often(询问频率)，how long(询问动作持续的长短)，how much(询问质量或者价钱)，how far(询问距离)how many(询问数量)，how soon (询问过多久)

英语中表示长度、高度、宽度、深度和重量的表达法有：

eg. The bridge is nearly 2000 meters long.

　　 这座桥长将近2000米。

　eg. This elephant is 1000 pounds heavy./This elephant weighs 1000 pounds.

　这头象重1000吨。

3….they weigh about 1,000 pounds,

……他们大约重1000磅。

Weigh 称……重量，测……重量。如：

He weighed the stone in his hand.

他用手掂了掂这块石头的重量。

The piece of meat weighs four pounds.

这块肉重四磅。

Weight 还可用做名词，重量。如：

What is your weight？

你的体重是多少？

1. I am like this animal because I am strong and intelligent.

Be like=look like=be similar to 像，看起来像。如：

He is like his father。他像他的父亲。

= He looks like his father.

= He is similar to his father.

这里的like作介词，意思为“像”，like 还可做动词用，表示“喜欢”，like(doing)

sth.喜欢做某事。如：

He likes his father very much.

他很喜欢他的父亲。

Mary likes playing volleyball.

玛丽喜欢打排球。

7. I’m writing to say that …

6. Zoos are terrible places for animals to live.

5. Some of the swamps have become polluted.

4. In 1972, it was discovered that they were endangered.

3. There used to be a lot of manatees.