英语,单项选择题（务必请说明选择的理由,

英语,单项选择题（务必请说明选择的理由,
1.He finished_______ the composition just now.
A.write B.writes C.to write D.writing
2.She enjoyed______ story books.
A.seeing B.to see C.reading D.to read
3.I found it not easy ______ English well.
A.learn B.learns C.learned D.to learn