A: _ did you come so late to your office this morning? B: Oh, I felt so sick that I couldn't get up on time. A. How B. Which C. Why
—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. .
—How does your father go to work?—He often goes to work __________.
After a long hiking, the boy was ________ tired to walk.