=>
1. Đúng
2. That store owner has done his business in the new mall since yesterday.
3. My friend is a very fluent English speaker.
4. Đúng
5. English is popular enough to be used all over the world.
6. Miss Lan asked me to open the door.
7. Mrs. Lan asked me if I could carry those chairs into the house.
8. He told me to give him my book.
9. The teacher said that we shouldn't make noise in class.
10. Mr. Hung asked if I could help Tam with his English pronunciation.
11. Đúng
12. Đúng
