I can’t find my key. _______ I left it at home.
—______ drive after drinking. It’s too dangerous(危险的).—OK. I won’t.
—What are you doing, Jack? —I am _______ my schoolbag, but I can’t find it.
—What is Lucy doing now?—She _____ a book.
—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. .