Look! There are so many         eating grass on the hill. 　　

Hearing the director’s “       !”，all the actors and actresses kept in the own position (位置) and waited carefully．

_____bedroom is very big.

Mr. and Mrs. Green work in the hospital, but they have no children. So they belong to _____.

—David, you left your English book on the desk?—It isn’t       . I think it is       .