你好,理由如下：They shouldn`t.
No.1 Because every day,they have so much homework to do.
No.2 They have their own time to relax after one-day busy classes.
No.3 As you know,Chinese middle school students are under too much pressure.
No.4 They don`t have enough time to do so because they have to stay at school usually.滿(mǎn)意請(qǐng)速速采納,謝謝合作!還有其他的嗎·？No.5 Sometimes they are so exhausted after studying all day long,so they have to relax but not help to do chores.No.6 They have to exercise after one-day busy and tring classes and they don`t need to do chores because they will be very tired.能配上翻譯嗎，謝謝