Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions.
This switch must not be touched on any account
on no account this switch be touched
on any account must you not touched this switch
on no account must this switch be touched .
on any account this switch must be touched .
Giải thích
Đáp án là C.
Cấu trúc đảo ngữ: On no account + auxiliary + S + V.