2013年高考英语二轮专题复习命题预测69
单项填空
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. Although he knew ________little about ______large amount of work done in the field, he succeeded where more well-informed experimenters failed.
A. a; the B. 不填；the C. a; 不填 D. the; a
22. --- I promise to go shopping with you if you help me with the housework
