Taxi booking apps_______ available for more than a year in some cities in Henan province since 2013....
2023-02-03 15:55:41 23次 2013-2014学年河南省洛阳地矿双语学校九年级中考模拟英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Taxi booking apps_______ available for more than a year in some cities in Henan province since 2013.
A. are B. were
C. will be D. have been
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