课后练习：

1. There can thus beno doubtthat time is into money.

A. convert B. Converted C. Convertible D. convertable

2. Our life is our time.

A. nothing more than B. something more

C. nothing more D.anything more than

3. We are shocked when we think of death, and we no pains, no trouble, and no expense topreserve life.

A. spend B.spear C.spent D. spare

4. A day or an hour is so much life .

A. waste、forfeit B.wasted、forfeited

C. wasting、forfeiting D. wasted、forfeiting

5. There is a third considerationwhichwill tend to warn us loss of time.

A. don’t B.off C.against D. again

6. If all these years deducted from the term over which our lifeextends, we find about fifteen or twenty years at ourdisposal for active work.

A. will; shall B.were to be; will

C. were to be; shall D. are to be; shall

7. The time of our childhood and of our youth is than any other portion of our existence,forthose arethe periods alone we can acquire knowledge and develop ourfaculties and capacities.

A. preciouser; when B. most proicous; that

C. more proicous ;when D. Precious; that

8. If we allow these morning hours of life to slip , we shall never be abletorecoupthe loss.

A. away B.back C. out D. down

9. If properly used, the precious hours ofchildhood and youth will yieldus advantages.

A. calculable B. Incalculable C. Calculate D.calculated

10. The mind of the idler preys itself.

A. into B.up C. on D. upon

答案：请在课文中寻找。

温馨小语：每段第一句即是本段主要讲述的内容，在翻译中标红了。