Our school has several weeks _____ in the summer time.
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.