问题描述：
1.Parents play a great role in _____ their children.（ ）
A.teach.B.teaches.C.to teach D.teaching
2.When winter comes ,days get _____.（ ）
A.long and long.B.short and short
C.longer and longer.D.shorter and shorter
A.teach.B.teaches.C.to teach D.teaching
2.When winter comes ,days get _____.（ ）
A.long and long.B.short and short
C.longer and longer.D.shorter and shorter
问题解答：
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