Complete: An advantage of being a twin is...
Very good!
Complete: One benefit of being the oldest is...
I agree with you!
Complete: A big disadvantage of having an older sibling is...
That's true!
Combine: I have a younger sister. The trouble is she always wants to borrow my clothes.
The trouble with having a younger sister is (that) she always wants to borrow my things.
Complete: A problem with being an only child is...
Good point!
Combine: I'm away at college. The bad part is that I miss my family.
The bad part about being away at college is (that) I miss my family.
Combine: I work at night. The worst thing is I can't have dinner with my family.
The worst thing about working at night is (that) I can't have dinner with my family.
Combine: I'm the oldest in the family. One bad thing is that I always have to babysit.
One bad thing about being the oldest in the family is (that) I always have to babysit.
Complete: The best thing about having a big familiy is...
Totally!
Combine: I'm the youngest in the family. The nice thing is I get a lot of attention.
The nice thing about being the youngest in the family is (that) I get a lot of attention.