选词填空
从方框中选择正确的单词并用其适当形式完成下面的句子。

How many _______ are there in the factory?
Mr White often goes for a walk with his _________ dog.
Have you _________ dinner?
We like our Chinese teacher, so we listen to her lessons ________.
There are two books on the desk. One is mine, the other is ________.
October is the _________ month of a year.
If we don’t protect the environment, our future will be _______.
________ you for your help, it’s very kind of you.
We should stop the factory from ________ the river.
Paper________ by Cai Lun in Han Dynasty.