从A, B, C, D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. Laws to protect _____ environment and _____ nature are of great importance. _____ Society / society has a right to see the law-breakers punished.
A. an; a; the B. /; /;/ C. the; /; / D. the; the; the
22. ¾ Did the speaker say anything that _____ you especially?
¾ Not really. Actually I slept through his speech.
A. appealed to B. attached to C. adapted to B. adjusted to
