阅读短文，从每题所给的A、B、C三个选项中，选出最佳选项完成句子。（共5小题，计10分）
A little monkey and a little fox(狐狸)are friends. One day, they went out to play. They saw an apple tree on the other side of the river. There were many big and red apples on it. But there was no bridge over the river and they couldn’t cross（跨过）it. The monkey thought hard and had an idea. They pulled down(推倒) a tree and put it over the river as a bridge.
The monkey said, “My old friend, you go there first.” But after the fox went to the other side, he kicked(踢) the tree into the river and ran to the apple tree. “How can I cross the river without the tree?” cried the monkey. The fox laughed and said, “You just stand there and watch me eating the apples.” The monkey was very angry.
Suddenly it began to rain. The water level(水位) in the river went up and the tree floated away (漂走) with the water.
“You can eat all the apples. But you can’t come back,” shouted the monkey.
The fox stopped eating and looked at the monkey sadly.
The little monkey and the little fox wanted to _______ on the other side of the river.
A. eat the apples
C. pull down a tree
D. play games
The monkey had an idea that _________.
A.they could swim across the river
B. they could use a tree as a bridge
C. they could use a tree as a boat
The fox kicked the tree into the river because___________.
A. he wanted to eat all the apples by himself
B. he was angry
C. the tree is not useful
The fox was sad because _________.
A. the monkey was laughing
B. he couldn’t reach the apples
C. he couldn’t come back
The story tells us that _________.
A. the fox shouldn’t go first
B. the fox was cleverer than the monkey
C. a friend shouldn’t only care about himself