21.（2011·吉安模拟）If you let challenges and difficulties benefit _____ depress you, much more can be accomplished than you thought possible．
A．more than B．rather than
C．less than D．other than
22.（2011·北京模拟）Today， _____ rapid transportation and communication, the whole world seems to be smaller．
A．regardless of B. in spite of
C．instead of D. because of
