Which of the following sentences is NOT grammatically correct?
(A) Successful though we are, we mustn’t act arrogantly.
(B) Such was the heat of the sun that many students fainted.
(C) Not only is the story well told, but the characters are extremely well drawn.
(D) It was then that came the moment we had been looking for.
(E) No sooner had we arrived than the train departed.