People have cut down many trees every year,so there will be fewer trees, ________

The role that our army_____ in flood control is very important.

I’m most awfully grateful to you. I can’t think what I ________ without you.

n problems such as energy crisis, pollution and populationexplosion_________, people are asked to share the bitterness and endure thehardship with all the whole nation of the times．

is it from the radio station— It’s about 5 kilometers.