题目内容：

    Moshe Kai Cavalin，a boy from San Gabriel，California，is only 17 years old. Yet he has already ________ so much. He has a university degree in ________. This year he started online classes in computer science and，it ________ him that NASA called to offer work after ________ him in the past because of his age. Meanwhile，he was encouraged to develop ________ at will. He just published his second book and planned to have his airplane pilot’s license by the year’s end.

Still，Cavalin insists that he’s a(n) ________ person rather than a genius. He ________ his parents with years of focused instruction balanced by the ________ to pick his after－school activities. “My case isn’t that ________. It’s just a combination of parenting and ________，” he says.

His parents say he was always a ________ study. At 4 months，he pointed to a ________ in the sky and said the Chinese word for airplane，his first word. Cavalin ________ the limits of his home schooling after studying trigonometry (三角学) at age 7. _______，his mom started driving him to community college.

But his rapid rise hasn’t been without ________. Early in college，he once ________ being an astrophysicist (天体物理学家). But he ________ interest when he started taking advanced physics classes. At that time，software ________ him，which led him toward computer science，which ________ to be a better fit. Ricardo Arteaga，his boss at NASA，says Cavalin is ________ for a project that combines math，computer and aircraft technology.

1.A.suffered B.achieved C.learned D.contributed

2.A.engineering B.physics C.math D.astronomy

3.A.disappointed B.satisfied C.surprised D.relieved

4.A.rejecting B.connecting C.employing D.consulting

5.A.careers B.habits C.abilities D.hobbies

6.A.intelligent B.ordinary C.fortunate D.aggressive

7.A.respects B.appreciates C.supports D.credits

8.A.freedom B.access C.limit D.guide

9.A.common B.attractive C.accidental D.special

10.A.competition B.regulation C.motivation D.restriction

11.A.careful B.quick C.clever D.happy

12.A.star B.bird C.jet D.kite

13.A.changed B.hit C.created D.defined

14.A.However B.Besides C.Instead D.Therefore

15.A.twists B.difficulties C.struggles D.barriers

16.A.gave up B.objected to C.dreamed of D.went on

17.A.added B.lost C.showed D.generated

18.A.fascinated B.defeated C.requested D.reminded

19.A.came out B.brought out C.put out D.turned out

20.A.perfect B.anxious C.grateful D.ready