21.----Would you prefer David or Brown to do it?
---- .
A. It is up to you. B.Both are right C.Thank you. D.I’m afraid.
22.----What do you think of our monitor?
----Oh,he is person who is ready to help others. It’s pleasure to study and live with him.
A. a; a B.the; the C.不填；a D.the; 不填
