We believed that Mary ____ take the money at that time ,though she was poor .A.won't B.wouldn't C.isn't going to D.will ,为什么?

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We believed that Mary ____ take the money at that time ,though she was poor .
A.won't B.wouldn't C.isn't going to D.will
,为什么?

主句是一般过去时 bellieved ,从句要用相应的过去时,除客观规律外.( 这里不是客观规律,只有B是一般过去时)

首先,这里从语义判断,应该选不会拿钱,选否定的,所以D排除。
然后,全句都是用过去式,选项中唯一为过去式的选项是B

wouldn't 表示曾经,表示她没有take the money.
根据后面的she was poor 可以看出