4.
Grammar:

1.Jane and Betty are getting on separate holidays in a few days’ time.
in a few days’ time=in a few days 几天以后
“in+一段时间”与将来时态连用表示将来一段时间之后。
I will come back in a hour.
after 也可表示一段时间之后，但常用于过去时态
He returned book after a week.
2.When are you off to Guangzhou?
be off=leave 表动作
be off to…=leave for…
3.Times changed and so does the way we live.
times 时代
Times are different.
Integrating skills:
1.Normal tourism is often bad for the environment, and the tourists often cause problem.
be bad for 对…有害处 其反义词为 be good for
Reading in the sun is bad for your eyes.
be bad to 对待某人不好
be bad at 不擅长
2.Eco-tourists want to learn about the would so that that can make it better, or at least understand it better.
learn about 了解有关…的事
Read this book and you’ll learn something about the war.
His mother learns about his success in the newspaper.
3.Eco-travel is a way to find out what can be done to help animals and plants as well as people.
find &find out
find “找到，发现”，通常表示无意找而发现；
find out 通常指经过努力“查明，查清楚”
We found the people there were very friendly.
Please found out the truth as soon as possible.
4.Imagine the four of you are going on an eco-trip.
the four of you 你们四个人（总共四个人）
four of you 你们当中的四个人
How about the two of us going swimming this afternoon?

生词表: