来自刘晓颖的问题
【()ofthestudentsinourclass(_)interestedinmicroblogs(微博)ontheInternetATwofifths;isBTwofifthsareC.TwofiveisDTwo-fiveare】
()ofthestudentsinourclass(_)interestedinmicroblogs(微博)ontheInternetATwofifths;isBTwofifthsareC.TwofiveisDTwo-fiveare

