— Where is the School English Speech Contest going to be held tonight?— I’m not sure. Is it in the hall _____ can hold 300 people?
—What class are they having?—Math. Their math teacher is _____ the classroom.
—What does your sister usually do in the evening?—She usually______ TV, but now she _____ a book. .
—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.