阅读下面短文，掌握其大意，然后从各题所给的A、B、C、D四个选项中，选出最佳选项。
Horror gripped（抓紧）the heart of the World War soldier，as he saw his lifelong friend falling in battle．Caught in a trench（战壕）with 1gunfire whizzing（鸣）over his head，the soldier asked his officer if he 2go out into the “No Man's Land” between the trenches to bring his __3comrade back．
“You can go，”said the officer，“ 4I don't think it will be worth it．Your friend is probably dead and you may throw your own 5away．”
The officer's words didn't matter，and the soldier went anyway． 6he 7to reach his friend，lift him 8his shoulder，and bring him back to their company's trench．As the two of them tumbled（跌倒）in together to the bottom of the trench，the officer 9the wounded soldier，and then looked kindly at 10．
“I told you it wouldn't be worth it，” he said．“Your friend is dead，and you are mortally（致命地）wounded．”
“It was worth it， 11，sir，” the soldier said．
“What do you mean by ‘worth it’?” 12the officer．“Your friend is dead!” “Yes sir，” the miner answered．“But it was worth it because when I got to him，he was still 13，and I had the 14of hearing him say，‘Jim，I knew you'd come．’”
__15in life，whether a thing is worth doing or not really 16how you look at it．Take up all your 17and do something your 18tells you to do so that you may not 19doing it later in life．May each and every one of you be blessed（保佑）with the company of 20．
1.A．bright B．continuous C．fine D．terrible
2.A．should B．must C．had to D．might
3.A．fallen B．dead C．lonely D．hopeless
4.A．and B．because C．but D．if
5.A．work B．friendship C．life D．gun
6.A．Easily B．Surprisingly C．Hardly D．Secretly
7.A．tried B．decided C．managed D．planned
8.A．onto B．over C．against D．with
9.A．wrapped B．checked C．comforted D．thanked
10.A．himself B．them C．themselves D．his friend
11.A．though B．in a way C．I wonder D．you know
12.A．responded B．warned C．advised D．ordered
13.A．afraid B．brave C．alive D．glad
14.A．satisfaction B．possibility C．honor D．experience
15.A．Some time B．At all times
C．Many a time D．At the same time
16.A．results in B．depends on C．looks like D．begins with
17.A．time B．energy C．courage D．money
18.A．heart B．friend C．parent D．boss
19.A．forget B．remember C．regret D．admit
20.A．true friends B．soldiers C．officers D．enemies
The scientist's discoveries were of great help to mankind．
A．a；the B．a；／ C．／；／ D．the；the
While building a bridge over the Changjiang River， ．
A．a big rock was discovered in the water
B．there was a big rock discovered
C．a big rock discovered in the water
D．the workers discovered a big rock in the water
I didn't know who for the broken window．
A．to be blamed B．to blame C．is to blame D．is to be blamed
I can't to London，because the lines are always busy．
A．get out B．get through C．go through D．get along
Though they are not sure of the long-term ，all the scientists agree to start the research immediately．
A．affect B．result C．effect D．effort
