It’s a beautiful day, isn’t it — Yes, it’s _____ that I’d like to take a walk.

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

Leaves fall _______piles ________the ground

ld have arrived earlier,but Tom insisted that I _________ too fast.

However busy we are, we need to take exercise. Not only _____ us keep healthy, it also stops us getting fat. [ ]