请认真阅读下面各题，从题中所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
21. It is widely accepted that _______ beautiful is always _______ joy to everyone.
A. a; a B. 不填; the C. the; 不填 D. the; a
22. —Do you think the weather will be all right this summer?
—No, ________ we’re lucky. The newspaper says it’ll be very hot anyway.
A. if B. though C. unless D. as
23. —I want someone to write the composition for me.
—No! As a student, you _________ depend on yourself.
A. shall B. will C. can D. may
24. Ad-makers choose words and brand names very carefully in order to make a creative image of the product they are _________.
A. processing B. producing C. providing D. promoting
25. Gradually, you will realize that the things that matter are ______ that can’t be bought with money.
