Which
of the following sentences is INCORRECT? ___________
选项：

A:You
didn’t let me drive. If we had driven in turn, you wouldn’t
have got so tired.
B:I
regret having left the work unfinished; I should plan everything
ahead carefully.
C:If
it snowed tomorrow, we would take photos.
D:You
should have snatched a free moment for writing a letter.