i used to think __ hard to learn english well.but i find __ easy to grasp it now.Ait's it B it it's选谁?要具体解释正确答案是选B 为什么A 不对?

问题描述:

i used to think __ hard to learn english well.but i find __ easy to grasp it now.
Ait's it B it it's选谁?要具体解释正确答案是选B 为什么A 不对?