How many novels … Charles Dickens …?
A. does – write
B. did – write
C. did written
D. have – written
Đáp án đúng là: B
Dùng thì quá khứ đơn vì sự việc đã xảy ra trong quá khứ
Dịch: Charles Dickens đã viết bao nhiêu cuốn tiểu thuyết?
The children have put away their toys but they didn’t make their beds yet.
They have decided to ride to work … it is good for their health and the environment.
You can volunteer by … children from poor families in your community.
Vietnamese people have had the … of helping one another since the early days of the country.
Choose the best answer
You can help young children by … them to do homework before or after school.
You should think of … the volunteer activities in your community.
Circle the mistake and then correct it.
Frank has done his homework and then listened to music.
Choose the best answer
Go Green … people to recycle rubbish, such as glass, cans and paper.