The presentation will be covered live on TV tonight.
—How does your father go to work?—He often goes to work __________.
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.