He made up his mind to devote his life ______ pollution _______ happily.

We’d better learn English well. It ________ in many countries around the world.

ou look up the time of the high-speed trains toShanghai —Yes, the early train is toleave at 5:30 a.m.

ate a harmonious society, we need to showgreater ______ towards each other.

Let’s have _____ break. I want to make _____ telephone call.