This river is so big that it is impossible to build a _______ under it without modern technology. ( 章节：4 难度：2)_做题室

单项选择题This river is so big that it is impossible to build a _______ under it without modern technology. ( 章节：4 难度：2): A、canal; B、tunnel; C、channel; D、cable

正确答案：B
答案解析：
关注下方微信公众号，在线模考后查看

热门试题