探究点 1 camp 的用法

【情境应用】
1. In autumn, Lily's family often go (camp) at the weekend.
2. Bob (camp) in the mountains with his friends last weekend and they took lots of photos.
3. Mary wants to take part in the art class at the school (夏令营) this year.

1. camping 2. camped 3. summer camp

探究点 2 cooperation 的用法
cooperation n. 合作，协作，其动词形式为 cooperate。相关搭配有：
in cooperation with...与……合作
cooperate with...与……合作
They finished the project in cooperation with the company. 他们和公司合作完成了项目。
She needs to cooperate with her team to win the game. 她需要和她的团队合作以赢得比赛。
【情境应用】
() 1. The school library organises a book sale the student union every term.

A.in need of
B.in cooperation with
C.in memory of
D.in terms of
2. 上周，我们班与三班合作举办了一场英语歌唱比赛。
Our class Class 3 to hold an English singing competition last week.

1. B 2. cooperated with

探究点 3 辨析 in the tree 与 on the tree

There's a bird in the tree.
树上有一只鸟。
There are many apples on the tree.
树上有很多苹果。
【情境应用】
in the tree，on the tree
1. There are many leaves .
2. There's a kite .

1. on the tree 2. in the tree