Chuyển câu cho nghĩa không đổi

----- Nội dung dịch tự động từ ảnh -----
3. The children couldn’t go swimming because the sea was rough.
The sea was too ____________________.
4. Nobody has used this car for years.
This car ____________________.
5. Unless he studies hard, he won't succeed in the next exam.
If he ____________________.
6. Ho Chi Minh City is busier than all the other cities in our country.
Ho Chi Minh City is the ____________________.
7. Watching a football match doesn't interest him.
He isn't ____________________.
8. Jane doesn’t sing as beautifully as Jackie.
Jackie sings ____________________.