1. Walking is a good way to keep fit and stay healthily.
- healthily -> healthy ( stay healthy: giữ gìn sức khỏe )
2. The woman prefers looking after her children than cooking dinner.
- than -> to ( prefer + N/Ving + to + N/Ving: thích cái gì hơn cái gì )
3. thousand -> thousands ( do có tobe "are" )
4. He leaved the office and disappeared two days later.
- leaved -> left ( quá khứ đơn của "leave" là "left" )
5. They looked angry at me when I broke the mobile phone last night.
- angry -> angily ( "look" trông câu này là động từ thường nên sau nó là trạng từ )