21. You should _______ any opportunities you have to practice English.
A. make fun of B. play a part in C. make use of D. get along with
22. Judging by her _______, Jane must be a southerner.
A. pronunciation B. accent C. voice D. sound
23. Tim, ______ you ______ your homework yet?
A. were, finish B. have, finished C. are, finished D. do, finish
