21. I’m ______ captain of the class team at school and I’m also ______ member of the Senior High team.
A. 不填; a B. a; a C. the; the D. the; 不填
22. —Where are you ________?
—I’m going to the airport to ________ my friend.
A. heading on; pick up B. going for; pick down
C. heading for; pick up D. heading away; pick down
