21. If you are in _______ position of _______ teacher, will you allow your students to play computer games all day long?
A. /; a B. a; / C. the; / D. the; a
22. Rather than ______ a car, he prefers ______ a motorbike to go to school.
A. driving; to ride B. drive; to ride C. to drive; riding D. to drive; ride
23. —Do you know Jim quarreled with his brother?
—I don't know, and ______ .
A. nor don't I care B. nor do I care
C. I don't care neither D. I don't care also