請教朗文改錯 - 自學

C 1. His efforts, which he claims are his best, would be
____________A
less than satisfactory even to the least demanding person
______________________B ___________________ C
than myself.
_____________D

C 哪裡錯呢

2. A cover letter did not have to accomany a resume; however, those who
______________A ________B
consider themselves experts in job placement would advise
___________C
sending both.
_____________D

我選D 因為不是advise to嗎
答案是A 怎麼解釋呢 因為時態嗎?
可是would不也過去式嗎 這裡不當過去式使用嗎

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