Speaking
4a Use the ideas in 3 to suggest ways to protect and preserve the man-made wonders of Viet Nam.
Example:
A: It is reported that many of our man-made wonders have been damaged. What should we do to protect and preserve them?
B: I suggest that we should limit the number of tourists visiting them every day.
A: That's a good idea. I'd like to suggest raising money to restore and preserve them...