1 . ________we made a great effort last term, we might have succeeded. （用适当的词填空）

2 . Had you listened to the doctor, you ________(be) all right now. （所给词的适当形式填空）

3 . _____ the free tickets, I would not have gone to the films so often.

A．If it is not

B．Were it not for

C．Had it not been for

D．If it had not been

4 . At the age of 14, Father had to leave school and start working. There would be no one to support the family _______ he not worked.

A．did

B．has

C．had

D．was