Those students are very good in English

Sửa at vì:at+subject

Which do you do in your free time? ______what __________vì what do you do in your free time?:để hỏi làm việc gì trong thời gian rảnh

Lan likes to learning experiments.____cấu trúc like/s+V-ing______

In Geography, we study maps and learn about same countries. ____similar______

. Ba is very good at fix things.______________

American students take... in different activities at recess. ___part___________

at recess, the school yard is very noisy until the bell ring _____rings____

When the bell rings, everyone goes indoor and classes begin again. ________________ 

What does Nam usually does after school?__do______vì ở trước đã mượn trợ động từ does nên động từ phải giữ nguyên________

We learn about books and write essays in Math. _______at_________

IV.

1.Those students are very good in English. (good at+sth=: giỏi cái j đó)

=>at  

2.Which do you do in your free time? (người ta dùng what do you do chứ ko ai dùng which)

=>what

3.Lan likes to learning experiments. (like+Ving,chứ ko phải + to V-ing)

=>learning

4.In Geography, we study maps and learn about same countries. 

=>different 

5. Ba is very good at fix things. (good at+ving)

=>fixing

6.American students take in different activities at recess. (take part in:tham gia)

=>take part in