Which of the following sentences does not contain an unreal conditional of mixed time?

A.If I had time, I would certainly go to the movie with you.

B.If you hesitated this moment, you might suffer in future.

C.I Mary should arrive today, she must have started three days ago.

D.If I were rich, I would have bought the villa last year.

正确答案：If I had time, I would certainly go to the movie with you.