四、语法填空。
Many parents want their kids to enjoy their free time while they're still young. So they may think it is 20. waste of time to make kids do chores.
21. doing chores is good for kids.
Doing housework well can give kids a 22. (feel) of achievement. My son 23. (sweep) the floor every weekend and my daughter folds the clothes for the family. They often finish the housework 24. (quick). Sometimes they talk 25. the chores with each other. For me, I would like to provide help only when they need it.
Doing chores makes 26. (child) feel like part of the family. 27. (I) son asks me why he has to do chores. I tell him that everyone in the family should share chores.
Kids can 28. (learn) the importance of finishing a task by doing housework. I think they should at least do it 29. (two) a week. It will be useful when they get older because it can make them become more responsible（有责任）for their work and family.

20. a 21. But 22. feeling 23. sweeps 24. quickly 25. about 26. children 27. My 28. learn 29. twice

20. 考查固定搭配a waste of time，意为“浪费时间”，故填a。
21. 考查连词，前文提到很多家长认为让孩子做家务是浪费时间，后文表述做家务对孩子有好处，前后语义转折，故填But。
22. 考查名词用法，不定冠词a后需接名词，feel的名词形式是feeling，a feeling of achievement表示“成就感”，故填feeling。
23. 考查一般现在时，时间状语every weekend表示经常性的动作，主语my son是第三人称单数，谓语动词要用第三人称单数形式，故填sweeps。
24. 考查副词用法，此处修饰动词短语finish the housework，需要用副词形式，quick的副词是quickly，故填quickly。
25. 考查固定搭配talk about，意为“谈论关于……”，此处指他们互相谈论家务相关的事，故填about。
26. 考查名词复数，此处泛指所有孩子，要用child的复数形式children，故填children。
27. 考查形容词性物主代词，后面有名词son，需要用I的形容词性物主代词My修饰名词，故填My。
28. 考查情态动词的用法，情态动词can后接动词原形，故填learn。
29. 考查频率表达，twice a week是固定表达，意为“一周两次”，故填twice。