If men can’t live in harmony nature, the balance will be destroyed.
Leaves are found on all kinds of trees, but they differ greatly __________ size and shape.
__________ what the six blind men said sounded! I can't help laughing!
—Doctor, it seems you like to work with animals.—Yes, I think animals should __________ as our friends.
Her parents require that she __________ TV after she finishes her homework.
In America and Europe, it is __________ to tip anything from 10% to 20%.