1D 2D 3D 4A

\(=\dfrac{x-2}{x+2}\)

B

\(=x\left(x+2y\right)-3\left(x+2y\right)=\left(x+2y\right)\left(x-3\right)\)

5. I don't know I may explore the caves.

6. They will swim in the sea.

7. Hoa'll build sandcastles on the beach.

8. Nam will eat seafood at Ha Long Bay.

1B 2A 3D 4C