B. Translate the following underlined sentences into English.
对于大多数城镇家庭来说，住房、子女教育、医疗目前已成为家庭负担中的最主要部分，占据了他们收入的大部分。
【正确答案】：
HOUSING, CHILDREN’S EDUCATION AND MEDICAL CARE HAVE CURRENTLY BECOME THEIR HEAVIEST BURDENS, ACCOUNTING FOR A MAJOR PART OF THEIR INCOME.
【题目解析】：Housing, children’s education and medical care have currently become their heaviest burdens, accounting for a major part of their income.考点：名词“住房”和“医疗”的准确翻译。