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. Dr.Peter Spence, _______ headmaster of the school, told us, “_______ fifth of pupils here go on to study at Oxford and Cambridge.”
A. 不填; A B. 不填; The C.the; The D. a; A
22. Simon made a big bamboo box _______ the little sick bird till it could fly.
A. keep B. kept C. keeping D. to keep
