1. Experts argue that although most companies see the need to reform in a crisis, many _____ the wrong kind of change.

　　A. take on B. improve on C. put on D. embark on

　　2. In my opinion, you can widen the _____ of these improvements through your active participation.

　　A. dimension B. volume C. magnitude D. scope

　　3. The climbers _____ their ambition by reaching the summit of the mountain.

　　A. obtained B. sustained C. maintained D. realized

　　4. While typing, Helen has a habit of stopping ________ to give her long and flowing hair a smooth.

　　A. occasionally B. simultaneously C. eventually D. promptly

　　5. It is well known that knowledge is the _________ condition for expansion of mind.

　　A. incompatible B. incredible C. indefinite D. indispensable

　　参考答案：

　　1. D 2. D 3. D 4. A 5. D