Cho dạng đúng của từ trong ngoặc
21. I don't know why my mother ( like) cooking 22. he collects books whenever ne ( have) money 23. how many paintings she ( paint)? 24. I love flovers so I ( plant) them around my house 25. eating junk food and inactivity ( be) the main causes of obesity 26. I have a headache and I need ( rest) more