a. _5_ Well, that’s difficult. Is it Cat Ba island?
b. _7_ Wow, interesting! My family traveled to Phu Quoc last summer. It’s a beautiful island.
c. _4_ Correct! Next, what's the largest island in Viet Nam?
d. _1_ Hey, Long. Can you help with my geography test? Ask me some questions, please.
e. _6_ No, Phu Quoc is the largest island in Viet Nam.
f. _2_ OK, I'm not busy now. I can help you. What's the highest mountain in the world?
g. _3_ It's Mount Everest, right?