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. We take our skin for granted until it is burned ________ repair.
A. beyond B. for C. without D. under
22. The old couple decided to ________ a boy and a girl though they had three of their own.
A. adapt B. bring C. receive D. adopt
