题目内容：

Maths,one of the most important subjects,____ always interested him.
A has B.have C.are D.is

优质解答

D
one of the most important subjects是插入语 主句是Maths is always interested him

追问：

is interested 是啥用法啊？ interested 这里是什么词？

追答：

interested是动词interest的过去分词 当作形容词使用，意思与interesting类似 区别在于interesting是“{某物）是有趣的” interested是“令人感兴趣的” 类似的词语还有boring 和 bored