— Why are you angry with Michael?— Because I waited for him for two hours last night, but he didn’t _______ at last.
—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.