—How long has your brother _________ in the army ?—About five years.
After a long hiking, the boy was ________ tired to walk.
— There are still many old city walls in Xi’an, _______?—Yes, there are.
—Whose purple coat is this?—It ____ be Lily’s. Hers is red. It _____ be Lucy’s. She likes purple.
—Our country is becoming _______.—Yes. We all love it.
—Look, Victor. This brown cat is ________ than that white one.—Yes. And it is _____ of all these cats.