A-A+ It is (driving) (on the left) (what) causes vi 2022-08-01 20:35:37 问答库 阅读 166 次 问题详情 It is (driving) (on the left) (what) causes visitors to Britain the (most) trouble.A．drivingB．on the leftC．whatD．most 参考答案 正确答案：C解析：强调句it is... that...。所以C项改为that就对了。
