Millions of people are enrolled in evening adult education programs across America. Community colleges have 【B1】 popular and the

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问题     Millions of people are enrolled in evening adult education programs across America. Community colleges have 【B1】 popular and their enrollments have increased 【B2】 . Larger universities are offering 【B3】 in the evening for adult students. 【B4】 , the demand 【B5】 more education is being 【B6】 . One reason for this is 【B7】 many older people are changing their professions. They are looking for different 【B8】 . 【B9】 reason is that repair costs have 【B10】 . Adults 【B11】 courses like plumbing and electric repair. This way they hope that the high 【B12】 for repairs can be avoided. New and advanced technology is the most important for the rise in 【B13】 education. Engineers and teachers and businessmen are taking adult education classes. They have found that more education is 【B14】 to do their jobs 【B15】 .
    【B16】 courses are offered. Many adult students take computer and business courses. Foreign languages, accounting and communication courses are also popular. Some adult students 【B17】 classes to earn degrees, others take courses 【B18】 the knowledge and skills 【B19】 they can receive. The lives of many people have been enriched 【B20】 adult education.

选项 A、been
B、become
C、more
D、most

答案B

解析 由句子结构可知have在此用作助动词,应当填入一个动词构成完成时态,故[C]、[D]首先排除。而由空格后一分句中的increased及上下文文意可知这里强调的是一种变化,因此[B]最恰当。
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