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.

There are .... onions in the kitchen.

It often is cool in the fall.

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

Her sister wants some sugar.

She is strong.

She isn't ..... .

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

My mother needs .... tea.

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

That is .... eraser.

She sometimes feel tired.

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?

I am going to visit my friend.

Điền dạng đúng của tính từ. 

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