1. People didn't make Ganh Da Dia. They are ................ rocks.
A
2. Ha Long Bay has thousands of big and small.
A
4. Ganh Da Dia has ........................ rock columns of different shapes and sizes.
B
3. Ha Long Bay is charming and the ...................... is wonderful.
B
5. There are many natural and man-made ............... in Viet Nam.
A