单项填空
21. Though Jack has failed twice in _____ PE test, he decided to have _____ third try.
A. the; the B. a; the C. a; a D. the; a
22. –Why, Simon. Someone seems to have called you over there.
--Yes? I _______ that.
A. am not realizing B. haven’t realized C. didn’t realize D. don’t realize
23. The position, however, _______ you are applying, is not quite a well-paid one.
A. that B. for which C. which D. to which
24. ________ help the people in the snowstorm in the South made him worried.
