1 . If Nina __________ that her husband would go to the bus stop to meet her, she wouldn’t have walked back home.

A．knows

B．knew

C．has known

D．had known

2 . He might have already recovered from his illness ________ the fact that he didn’t follow the doctor’s advice.

A．if it was not for

B．were it not for

C．if it should not be for

D．had it not been for