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[单选题]"While" is often used to _____.YUg答案窝(daanwo.com)-大学生作业答案及考资分享平台
Aintroduce another opinionYUg答案窝(daanwo.com)-大学生作业答案及考资分享平台
Bsupport previous sentenceYUg答案窝(daanwo.com)-大学生作业答案及考资分享平台
Cshow sympathy with other's ideasYUg答案窝(daanwo.com)-大学生作业答案及考资分享平台
Dagree with other's opinion

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