[填空题]Questions 47 to 56 are based on the following passage.
Language barriers present a variety of challenges for children of any age. In Houston alone, bilingual education programs have helped many grade-school students (47) the trials that accompany not being able to speak English.
In the past, such vital curriculum was not always readily (48) for children who needed it. One person who experienced the (49) of school life without a bilingual program was UH education professor Yolanda Padr6n.
As a child, Padr6n and her family moved from Cuba to the United States. Settling in Landover, Mass., she was placed into elementary school, but had no working (50) of English. With that, she found herself at a (51) disadvantage.
"When I came here, I was in the fifth grade, but because I didn’t speak English, they put me back a year," she said. "We lived there for about six months before we moved to Houston. When I came h