She find____difficult to learn English well.----(B)

问题描述:

She find____difficult to learn English well.----(B)
A.it is B.it C.that D.this
什么时侯选A\C\D
为什么选B

昏迷ing,
高中的英语里解释是:固定用法.find it difficult to do sth.'或者find that it is difficult to do sth