题目

Community Service Nowadays high schools are faced with a very controversial issue whether or not community service hours are needed to graduate. High schools are arguing that 40 hours of community service are needed to graduate, but many upset students are voicing protests(反对) to this demand. Supporters of the community service project argue that while high school students are participating in community service, they will become better aware of what the real world is like. Students will learn valuable life lesson by doing community service. ____51____ They feel that if high school下面划线字注音正确的选项是①涎水（     ）　②揩油（     ）　③晌午（     ）A、①xián；②kǎi；③shǎng　B、①xián；②kāi；③shǎng　C、①xián；②kāi；③xiǎng　D、①dàn；②kāi；③shǎng