21. ----- Stay a bit longer; it’s been such ________ fun having you with us.
-----Thanks, anyway. I’ve got ________ early start tomorrow morning.
A. /, the B. a, an C. /, an D. the, an
22. ----- What do you think of the advice ______ by our English teacher?
----- No one has given me _________. We’d better take it strictly.
A. giving, a better piece B. given, a better piece
C. given, the better piece D. giving, the better piece
