The grass ______ many animals live is abundant here.A．by whichB．with whichC．on whichD．of w

As a defense against air－pollution damage, many plants and animals ______ a substance to a

There are many animals, however, ____ never play.A: whatB: whichC: thatD: where

In the long history of natural evolution,many kinds of animals have______from the earth.A．

The national parks are very important for preserving many animals, who would ______run the

There are among many American families______.A.li

Many newcomers complain of the rapid ______ of li