Dài nhất trong khu vực Đông Nam Á đó là sông nào?
A. Sông Sa-lu-en.
B. Sông Hồng.
C. Sông Mê-nam.
D. Sông Mê Công.
IX. Write questions for the underlined part.
1. They are visiting a milk farm on Saturday. ______________________________________?
2. Yes, there are four windows in my classroom. ___________________________________?
3. I’m going to the judo club with my brother. ___________________________________?
4. We’re working on our school project. ___________________________________?