1.Being a parent is not always easy, and being the parent of a child with special needs often carries with _______ extra stress.
A.it B.them
C.one D.him
2.-- There is still a copy of the book in the library. Will you go and borrow ________ ?
---No, I’d rather buy __________ on the internet.
A.it; one B.one; one
C.one; it D.it; it