21. To the parents’ worry, some middle school students are ______ computer games and completely forget their studies.
A. crazy about B. very fond of
C. concerned for D. serious about
22. I am tired _____ the partner I have been working with; he is too hard a person______.
A. with; to get along with B. from; to be got along with
C. of; to get along with D. of; getting along with
