问题补充：
— 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
答案：
A. has put
B. put
(答案→)C. had put
D. would put
解析：
试题分析: 句意：你认为那个年轻的女士怎么样?她工作努力。她生病前把所有的精力投放到工作中了。put effort into把精力花费在；花费精力在生病之前，过去的过去为过去完成时，故选C.
