1. My mother (not buy) hasn't bought me a new bike yet.

2. If I (not practise) don't practise my golf, I won’t get any better.

Câu đk loại I: If + S + V, S +will/ won't + V

3. Jeans (make) made about two hundred years ago.

4. Listen to these foreigners! What language (they /speak) are they speaking?

5. He tried to avoid (answer) answering my questions.

avoid +Ving

6. They suggested we (raise) should raise money to help poor people. 
Cấu trúc suggest: suggest + S + should V (trường hợp trên)
suggest + Ving

7. We should use paper as (economy) economical (tiết kiệm) as we can.

8. The gas from the chemical factory is extremely (harm) harmful.

Trạng từ hay đi kèm với tính từ/động từ