___is my mom.mom,_____is my teacher. A.It;it.This;this C.That;that D.That;this
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___ismymom.mom,_____ismyteacher.A.It;it.This;thisC.That;thatD.That;this___ismymom.mom,_____ismyteach
___is my mom.mom,_____is my teacher. A.It;it.This;this C.That;that D.That;this
___is my mom.mom,_____is my teacher. A.It;it
.This;this C.That;that D.That;this
___is my mom.mom,_____is my teacher. A.It;it.This;this C.That;that D.That;this
B This,this
向对方介绍朋友/第三者时用THIS