以下语句用于打开一个顺序文件Open"C:\MyFile.txt"For OutPut 但该语句的一个重要错误是没有 ___

If I ____ your address, I would have visited you.

A: know

B: knew

C: have known

D: had known

A、had had

B、have had

C、had

D、would have had

______for your advice, I would have been taken in.

A．Had it not

B．Had it not been

C．If it had not

D．Weren't it

A、Had you not given me

B、I had not given

C、You had not given me

D、Had I not given

A、 Hadn’t it been for

B、Had it not been for

C、Had it been for

D、Had not it been for

A、Hadn’t it been for

B、Had it not been for

C、Had it been for

D、Had not it been for

If I _______ any money to invest, I would invest it in that land.

A. had

B. have

C. have had

D. had had

A、could see

B、had seen

C、will see

D、will have seen

A．have

B．have had

C．had

D．had had

--Why didn't you buy it？

--I ______, but I didn't have the money.

A. would

B. would have

C. had had

D. had bought