从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卷上将该选项的标号涂黑。
21．-Would you mind giving your advice on how to improve our business management?
-If you make_____most of the equipment，there will be_________rise in production．
A．不填；不填   B．the；a          C．不填；a         D．the；不填
22．-The dumpling is very delicious!Thank you for inviting me to eat．
-______．I’m glad you enjoy it．
A．All right．    B．Really?          C．Never mind．    D．Don’t mention it．