如果一周后不下雨的话,农民们将自己灌溉他们的农田.
The farmers will water their fields by themselves in a week.
Jack looked through the (介绍)about the book before he decided to buy it.
Students should answer questions loudly and (清楚)in class.
Do you need to (讨论)the problem in groups?
Please keep (安静)when you are in a library.
不要怕犯错,我们可以从错误中学到东西.(learn from)