Although it is considered _____ to establish a perfect food security system, many challenges still remain.
書本給的答案為A, 但consider的被動用法不是It is considered +受詞補語 +to不定詞
- LouisLv 77 年前最佳解答
I consider him (to be) foolish. 受詞補語是形容詞（he is foolish)
= I consider him (to be) a fool.受詞補語是名詞（he is a fool)
=/= I consider him (to be) foolishness. 此句不成立。因為受詞的意思與受詞不符 him =/= foolishness。
Although it is considered (to be) feasible to establish a perfect food security system...
= Although to establish a perfect food security system is feasible ...
To establish ... is an action
This action is feasible.成立(feasible = possible)。
This action is feasibility.不成立。
This action is feasibleness.不成立。