Sửa lỗi. 

We should to protect the environment.

Viết lại câu sao nghĩa không thay đổi so với câu ban đầu. 

The Mekong River is longer than the Red River.

The Red River ................................. .

They often play soccer in the afternoon.

The Mekong River is the .... river in Vietnam. (long)

My brother is .... student.

It often is cool in the fall.

Chuyển các câu sau sang dạng phủ định và nghi vấn. 

Her sister wants some sugar.

There are .... onions in the kitchen.

She is strong.

She isn't ..... .

I am going to visit my friend.

My mother needs .... tea.

Sắp xếp các câu sau thành đoạn hội thoại.

- It's Sunday. I'm going to visit my friend.

- Hi. What are you going to do tomorrow?

- He lives in the country.

- Where does your friend live?

- Sometimes.

- How often do you come there?

Điền dạng đúng của tính từ. 

Tokyo is .... than London. (big)

She sometimes feel tired.

Hoàn thành các câu sau sử dụng: a, an, a few, a little. 

That is .... eraser.

Nam is .... than Ba. He is the .... boy in class. (tall)