根据句意用适当的介词填空.

问题描述:

根据句意用适当的介词填空.
They come to China ______ learning Chinese.
These elephants are _____Thailand.
I have to read books _____ three hours on weekends.
There are _____two hundred animals in the zoo.
根据汉语提示完成下列句子,每空词数不限.
We can't buy _______(象牙制成的东西).
Can you tell me __________(如何去挽救)these animals.
Some animals are ___________(失去他们的家园).What can we do?

1 for
2 from
3 for
4 about
1 things made of ivory
2 how to save
3 losing their home