企业为固定资产发生的下列各项后续支出中,能使企业的经济利益利超过原先的估计并预以资本化的有（）。

A.If I had time, I would study French

B.If I have time, I will study French

C.If I had had time, I would have studied French

D.If I should have time, I would study French

To ________ as a doctor you have to study a long time and pass exams.

A rectify

B satisfy

C classify

D qualify

______ enough time to study, I would have been able to enter university.

A．Have I

B．I have

C．Had I

D．I had

The boy regretted having spent so much time playing when he______.

A．should have studied

B．had studied

C．was to study

D．must study