题干

Although the peak travel time for Chinese railway doesn't start until Jan 19 this year, people who're eager to get a seat on the train _______ already _______ their struggles.
A.are; startingB.has; startedC.have; startedD.are; started
上一题 下一题 0.85难度 单项选择 更新时间:2013-06-28 09:10:03

答案(点此获取答案解析)