2. the Imperial City/to Hue./visit/when/you/You/travel/must

⇒ When you travel to hue, you must visit the imperial city.

3. in/the/is/longest river/Mekong River/the Southeast Asia.

⇒ Mekong river is the longest river in Southeast Asia.

4. Asia./in/is/The Gobi Desert/largest/the/desert

⇒ The Gobi Desert is the largest desert in Asia.

5. Hoan Kiem Lake/because/forget/to visit/it’s/Don’t/very/beautiful.

⇒ Don't forget to visit Hoan Kiem lake because it's very beautiful.

6. in/biggest/is/Son Doong Cave/the/cave/Vietnam.

⇒ Son Doong Cave is the biggest cave in Vietnam.

7. highest/in/Vietnam./mountain/is/Phanxipang Mountain/the

⇒ Phanxipang Moutain is the highest moutain in Vietnam.

8. I/think/Sapa/is/summer./more/the/beautiful/in

⇒ I think the summer in Sapa is more beautiful.

9. Ly Son Island./Phu Quoc Island/than/famous/is/more

⇒ Phu Quoc Island is more famous than Ly Son island.

10. tourist/has/attractions/a lot of/Viet Nam

⇒ Viet Nam has been a lot of attractions for tourist.

`2` When you  travel to Hue, you must visit the Imperial City .

`3` Me Kong River is the longest river in the Southeast Asia

`4` The Gobi desert is the largest desert in Asia

`5` Don't forget to visit Hoan Kiem lake because it's very beautiful

`6` Son Doong Cave is the biggest cave in Vietnam

`7` Phanxipang moutain is the highest moutain in Vietnam

` 8` I think the summer in Sapa is more beautiful

`9` Phu Quoc Island is more famous than Ly Son island

` 10`  Viet Nam has  a lot of attractions for tourist