Question

— What do you think of the young lady?
— She is hard-working. She ________ all her effort into her work before she got ill.

A．has put

B．put

C．had put

D．would put

Answer 1

C

解析试题分析：句意：你认为这个年轻的女人怎么样？——她工作很努力。在她生病以前，她把所有的经历都投入到了工作当中。结合语境可知本句描述的是一直持续到过去某时的动作，故用过去完成时态，选C。
考点：考查动词的时态。