Mary lost the ticket. She didn’...

Câu hỏi: Mary lost the ticket. She didn’t go to the concert.

A. If Mary had lost the ticket, she would have gone to the concert.

B. Had Mary not lost the ticket, she would have gone to the concert.

C. Hadn’t Mary lost the ticket, she would have gone to the concert.

D. If Mary hadn’t lost the ticket, she would go to the concert.