Task 4:

1, B -> Lake Hudson

2, B ->many

3, D -> would be

4, B -> breakfast

5, C -> has

6, D -> a

Task 5:

1, If you want to widen your English vocabulary, you should read short stories in English.

2, You can succeed in becoming a tour guide if you learn more about history and culture.

3, You may improve your English if you go to either The Sun or The Shine.

4, If I saw a fly in my soup at a restaurant, I would definitely report it to the manager and leave the restaurant and never come back again.

5, If I were you, I would choose Ha Long to be the destination for a one-day excursion.

Chúc em sức khỏe và học tốt nhé!