21. — Michael was late for Mr. Smith’s oral class this morning.
— _________? As far as I know, he never came late to class.
A. How come B. So what C. Why not D. Guess what
22. Do you think there can be any funds __________ to assist teachers who want to attend the conference?
A. effective B. acceptable C. competent D. available
23. What is the __________ of having the newly-built road reconstructed? I just can’t understand.
A. need B. matter C. sense D. opinion
