--------a good ideaA.That sounds likeB.That's sounds likeC.That's likeD.That's sounds

--------a good ideaA.That sounds likeB.That's sounds likeC.That's likeD.That's sounds
--------a good idea
A.That sounds like
B.That's sounds like
C.That's like
D.That's sounds

--------a good ideaA.That sounds likeB.That's sounds likeC.That's likeD.That's sounds
A
听起来是个好主意
sounds是动词
所以不可能有IS

A
听起来是个好主意

A
that 可以用it替代

A

that sounds like听起来是个好主意