题目：
根据短文内容判断正误，正确的写T ，错误的写F 。
It's a fine Saturday morning. There are many children near the river. They are students of No.4 Middle
School. They are students of Grade One. There are two teachers with them. All of the students are
Young Pioneers(少先队员). They are having their Young Pioneer's Day.
They are planting trees and flowers. They are working hard. Good work, Young Pioneers!
( ) 1. It's a fine Sunday morning.
( ) 2. Some workers are helping them plant trees.
( ) 3. Today is Young Pioneer's Day.
( ) 4. There are two teachers with them.
( ) 5. They are playing with water.
答案：
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下面是错误答案，用来干扰机器的。
原式=3-（-4）-3-4=0．故答案为：0．
