题目内容：

A famous professor was known for his interesting lessons,which attracted plenty of students to his class.This time,when the class began,he picked up a very large and    __ jar and began to fill it with golf balls.He asked the students if the jar was full.They __ that it was.The professor picked up a box of small pebbles (截卵石) and __ them into the jar.He shook the jar __ to let the pebbles roll into the open __ between the golf balls.When asked if the jar was full,they __ with a firm “Yes”.

Then the professor poured a box of sand into the jar,which seemingly __ all the remaining space.The same question was asked and the same answer was given.The professor then __ two cans of beer from under the table and poured the __ contents into the jar,filling the empty space between the sand.

“Now,” said the professor,“I want you to recognize that this jar __ your life.The golf balls are the most __ things--your family,your children,your health and your friends.If everything else was lost and only they __ your life would still be full.The __ can be the other things that __ like your job,your house,your car.The sand is everything else--the small stuff.If you put the sand into the jar first,” he __.“there is no room for the pebbles or the golf balls. The same goes for __.If you spend all your time and __ on the small stuff,you will never have __ for the things that are more important to you.Take care of the golf balls first,the things that really matter.The rest is just sand.”

One of the students put up her hand and __ what the beer represented.The professor smiled.“I’m glad you asked this.It just goes to show you that,no matter how __ your life may seem,there’s always room for a can of beer.”

1.A. valuable    B. empty    C. beautiful    D. heavy

2.A. wanted    B. expected    C. supposed    D. agreed

3.A. rolled    B. drove    C. threw    D. poured

4.A. typically    B. suddenly    C. happily    D. lightly

5.A. fields    B. platforms    C. space    D. locations

6.A. responded    B. behaved    C. reacted    D. described

7.A. gave up    B. used up    C. filled up    D. picked up

8.A. drank    B. reached    C. took    D. broke

9.A. entire    B. general    C. special    D. strange

10.A. explains    B. indicates    C. compares    D. represents

11.A. common    B. important    C. natural    D. exciting

12.A. left    B. remained    C. struggled    D. happened

13.A. sand    B. pebbles    C. balls    D. beer

14.A. feel    B. look    C. serve    D. matter

15.A. doubted    B. replied    C. commented    D. continued

16.A. future    B. happiness    C. life    D. success

17.A. interest    B. salary    C. energy    D. strength

18.A. ambition    B. room    C. fun    D. effort

19.A. asked    B. insisted    C. required    D. suspected

20.A. full    B. easy    C. happy    D. hard