题目内容：

    Bobby the mountain climber was famous for his attempts to climb the big snowy mountain. He had tried it at least thirty times, but had always failed halfway.

For the sake of ________ Bobby to try again, Old Peeper, the town optician, who bore witness to his ________, presented him with a pair of ________ sunglasses. "If it starts clouding over or if your feet start hurting, put on these glasses. They'll help you.” Bobby accepted the ________ without giving it much mind, but when his feet started _________ again he remembered his words and put on the glasses. Then ________ came as usual in the form of cloud cover, but seemingly not so thick this time. So Bobby ________climbing, leaving the clouds behind, forgetting his ________, and finally arriving at the summit. It was ___________ worth it. His feeling of triumph was ________, almost as magnificent as that wonderful ________. Resplendent in its silence, the mountain below was surrounded by a dense sea of clouds. Bobby didn't remember the clouds being as ________ as that, so he looked more closely at the sunglasses, and ________ everything.

Peeper had carved a light ________ on the lenses (镜片), in the form of the snow-covered summit. It was made in such a way that you could only ________ it if you looked upwards. Peeper had understood that whenever Bobby lost sight of his ________, he would similarly lose sight of his dream, and his ________ to continue would weaken.

Bobby realised that the only obstacle to reaching the summit had been his own _______. When he could no longer see the top of the mountain, the problems ________. He thanked Peeper for using that little ________ to help him see that his aims were not impossible, and that they were still there, where they had always been.

1.A.convincing B.encouraging C.educating D.entertaining

2.A.practice B.disadvantage C.growth D.failure

3.A.special B.beautiful C.fancy D.expensive

4.A.gift B.challenge C.award D.request

5.A.breaking B.damaging C.aching D.swelling

6.A.danger B.adventure C.pressure D.misfortune

7.A.quitted B.kept C.accomplished D.abandoned

8.A.problem B.pain C.injury D.anxiety

9.A.normally B.practically C.certainly D.exactly

10.A.incomparable B.invisible C.undesirable D.unmeasurable

11.A.experience B.attempt C.view D.present

12.A.white B.thin C.dark D.thick

13.A.recognized B.grasped C.believed D.acknowledged

14.A.image B.spot C.photo D.message

15.A.move B.feel C.change D.see

16.A.objective B.power C.success D.journey

17.A.preference B.will C.competence D.concentration

18.A.mistake B.prejudice C.ignorance D.discouragement

19.A.set off B.cut in C.set in D.showed off

20.A.technology B.tool C.trick D.mark