IV,

1. D : Unfortunately, he couldn’t find any eggs.

2. B: Once a farmer lived a comfortable life with his family

3. D: The wife wanted more, so her husband decided to cut open all the chickens and find more gold eggs

4. A: One day, he went to collect the eggs and discovered one of the chickens laid a gold egg. He shouted excitedly to his wife, “We’re rich! We’re rich!”

5. C: His chickens laid many eggs which the farmer used to sell to buy food and clothing for his family.

V,

1, => You have to do your homework every day ( Bạn cần làm bài tập về nhà mỗi ngày)

Cấu trúc: Subject + have/has to + verb (+object)

2, => Nam isn't old enough to drive a car ( Nam không đủ tuổi để lái xe ô tô )

Cấu trúc: Subject+ to be + Adj + enough + to + verb 

3, => I used to have a dog ( Tôi từng có một chú chó )

Cấu trúc: Subject + used to + verb (+object)

4, => They are planning to invite him for dinner {tonight} ( Họ đang lên kế hoạch về việc mời anh ấy đến ăn bữa tối {tối nay} )

Cấu trúc: Subject + to be + v_ing +to + verb(+object)

5, => It is very dangerous to put a knife into an electrical socket ( Việc đưa dao vào ổ điện rất nguy hiểm )

Cấu trúc: It is (+very) +adj+to+verb(+object)