英语情态动词填空father spent hours talking to him,At last he____drop the silly idea.可以填was able to吗

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英语情态动词填空fatherspenthourstalkingtohim,Atlasthe____dropthesillyidea.可以填wasableto吗英语情态动词填空fatherspentho

英语情态动词填空father spent hours talking to him,At last he____drop the silly idea.可以填was able to吗
英语情态动词填空
father spent hours talking to him,At last he____drop the silly idea.
可以填was able to吗

英语情态动词填空father spent hours talking to him,At last he____drop the silly idea.可以填was able to吗
可以
be able to等于have the ability to约等于can
can只能用于一般现在时和一般过去时
其余两个适用于任何时态

要求情态动词 填空
have to 也可以吧
那就填 had to不得不。。
填was able to 不行。意思不通

填 was persuaded to 似乎语意更通顺