that he found it difficult to stop at the busy crossing.
A. So fast he was driving
B. So fast was he driving
C. So fast drove he
D. So fast he drove
网友回答
A. So fast he was driving
(答案→)B. So fast was he driving
C. So fast drove he
D. So fast he drove
解析：考察部分倒装句。当“so+adj/adv”或者“such+名词”放在句首的时候，后面的主句使用部分倒装的形式。句意：他开车如此快，以至于在红绿灯的时候，他很难停下来。本题是把So fast放在了句首，后面使用了部分倒装的形式。故B正确。