Two friends visited the zoo together. The zoo was very large

Two friends visited the zoo together. The zoo was very large and it was ____1____ to go everywhere. They had to decide where and which animal to visit as their time was ___2___. So both of them agreed not to ____3___ after choosing a ____4___  at every fork(岔道口).
A road sign at the first fork ____5____ one way to the lion quarters and the other to the tiger hill. They decided on the ____6____ after a ___7____ discussion because lion were “the king of the grassland”. The second showed a division(路口) going separately to the pandas and peacock. They ____8____ pandas as it was the nation’s treasure and went the way. Thus they made choices all along the way and each choice meant ____9____ what they couldn’t help regretting. But they had to make it, and ____10____, for it brooked(容忍)no delay. If they hesitated they would miss ___11___. Only ___12___ decision could offer more chances for sightseeing and ___13____ possible regret.
Life is ____14____ like this------ choices often occur that one has to make, for example, between two ____15_____ jobs, two fascinating wooers(追求者). To get one you ___16____ give up the other ------- you can get half of it. If you __17___ weighing the pros and cons and calculating gains and losses, you will most likely _____18_____ empty-handedness. Don’t be sad about it. ___19___ you have got half of the desirable things in life ------ something that is ___20____ to come by.
1.A. easy         B. eager      C. impossible       D. possible
2.A. enough       B. limited     C. tight            D. plentiful
3.A. retrace       B. come       C. go              D. go back
4.A. main road     B. branch      C. crossing         D. highway
5.A. showed       B. pointed      C. intended        D. made
6.A. former        B. later        C. lost            D. the third
7.A. brief          B. long        C. no             D. heated
8.A. hoped         B. wanted      C. favored         D. got
9.A. getting        B. taking       C. grasping       D. giving up
10.A. slowly       B. immediately    C. timely        D. easily
11.A. less          B. more         C. most          D. least
12.A. high         B. slow          C. short          D. rapid
13.A. increase      B. rid           C. reduce        D. raise
14.A. just exactly    B. more or less    C. hardly        D. most
15.A. unwanted      B. rejected       C. enjoyable     D. desirable
16.A. wish          B. want          C. must         D. have to
17.A. spend time     B. kill time       C. have a hard time  D. hope for
18.A. start with       B. get up        C. succeed in       D. end up in
19.A. By no means    B. Not in the least C. At most         D. At least
20.A. stupid         B. delighted      C. hard            D. supported