The other driver _____ Wilson, who was a taxi driver, of driving dangerously. [ ]

下列各句中，加点的成语使用不恰当的一项是（）

_________ do you spell it

________the help of the teacher, the student who wasn’t good at math________the difficult problem quickly[ ]

“Well done, John! Not a single mistake____ in your exam paper this time!”said the teacher[ ]