All things ____,the planned trip has to be called off.A.considered B.having considered 选哪个?为什么?请说明理由.

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All things ____,the planned trip has to be called off.
A.considered B.having considered
选哪个?为什么?请说明理由.

A 此句应为考察被动语态的用法,从句意上分析,这句话的意思是说“所有的事情都被考虑周全了,计划的旅行已经蓄势待发”.事情是被我们考虑的,其自身不会考虑,所以只要选择一个被动语态的词语就行了,considered是被动语态显然可以;再看B项having considered 是现在完成进行时,显然不符合要求.