All the flights _ because of the snowstorm, we had to take the train instead._做题室

单项选择题 All the flights _ because of the snowstorm, we had to take the train instead.: A、 were canceled; B、 had been canceled; C、 having canceled; D、 having been canceled

正确答案：D
答案解析：
关注下方微信公众号，在线模考后查看

热门试题