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英语基础问题提问Itisdifficulttaskto()alanguage括号里填learn还是learning?

题目详情
英语基础问题提问
It is difficult task to ( )a language
括号里填learn还是learning?
▼优质解答
答案和解析
learn;
it is +adj+ to do sth
it is a/an/不加+adj +n+ to do sth