21. In order to get ________ better job of the two, he claimed that he could speak ________ second language, hoping it was ________ advantage over the other applicants.
A. the; a; an B. a; a; the C. the; the; 不填 D. a; the; an
22. I just don’t understand ________ that prevents so many children at school from being as happy as one might expect.
A. what it is B. what it does C. what is it D. why is it
