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. ______ rich only occupy themselves with making money and profits, and have no eye for ______ needs and welfare of the poor.
A. 不填；不填 B. 不填; the C. The; 不填 D. The; the
22. Do come back home early tomorrow ______ we’ll toast to Father’s birthday with a glass of wine together.
A. otherwise B. then C. and D. or
23. Della, with a sad smile on her face, lay on the grass with her beautiful-looking arms ______ under her small head.
A. crossing B. crosses C. to cross D. crossed
