21. Miss Emily is one of the foreign teachers ______ now teaching in our school .
A. which are B. who are C. who is D. whom is
22.If you like classical music, why not join a music club ______ other children play classical instruments?
A. when B. which C. where D. that
23. I don’t like the way ______ you speak to your parents.
A. that B. which C. in that D. what
24. My mother, ______ you met last year, keeps telling me not to take the weight-loss pills because they are dangerous.
A. that B. which C. who D. whom