Whenmakingmoderncameras,peoplebeganto_______plasticsformetal.

This boy was _______ for what he had done in the class.

This river forms a natural _______ between China and Korea.

Allthememoriesofhischildhoodhad_______fromhismindbythetimehewas65.

She is already 16years old. But she _______as if she were still a little girl.