21．—Would you mind giving your advice on how to improve our business management?
—If you make ____ most of the modern 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 education program________combining brain work with manual labor is being widely spread throughout the country.
A．to aim at B．aims at
C．having aimed at D．aimed at
