题目内容：

    A teenager who once became homeless graduated at the top of his class in Houston, Texas this weekend. Derrick Ngo.18, had a_______childhood, growing up without a father and finding his mother in and out of prison through the years.

Ahead of his________. Ngo had been to 12 different school, At 15, be started to________on his own with some help from his mother, but it was barely enough that he________homeless about two yean later. Ngo________his childhood to VOA."We often didn't have that much food. We didn't have that much money. We didn't have a_________source of income and that was one of my biggest________in growing up - that Lack of parental________."

Determined to change his future, Ngo_________all his frustrations (沮丧) into his studies-efforts that________landed him as the top student of his class at Energy Institute High School. "I________that if I didn't use schoold, education and the resources that were________to me, then there would be no way that I would get out of the________I was in," he said.

In December, Ngo learned that he had been________by Harvard, where he will be attending this fall. It was ,at frst, a _________…I just got into Harvard. My heart was________." he said. He was very excited. The young man_________his success to discipline(自制力)and laser-like (激光一样的)________on end goals. "With a dream in your heart, you will have a clear_______that you're working towards. Although it's not real yet, is________that is going to be real one day."

1.A.happy . B.boring C.troubled D.bright

2.A.failure B.difficulty C.independence D.achievement

3.A.live B.work C.learn D.train

4.A.got up B.grew up C.broke up D.ended up

5.A.recorded B.repeated C.recalled D.recommended

6.A.new B.stable C.spare D.balanced

7.A.desires B.features C.struggles D.advantage

8.A.pressure B.guidance C.training D.introduction

9.A.added B.counted C.combined D.directed

10.A.firstly B.slightly C.eventually D.unexpectedly

11.A.bet B.heard C.wondered D.remembered

12.A.donated B.available C.designed D.affordable

13.A.trap B.truth C.danger D.circle

14.A.told B.invited C.dismissed D.accepted

15.A.gift B.pity C.shock D.sympathy

16.A.rising B.racing C.beating D.sinking

17.A.owes B.devotes C.applies D.contributes

18.A.care B.focus C.confidence D.appreciation

19.A.goal B.way C.plan D.position

20.A.nothing B.anything C.everything D.something