fill in the relative pronoun. put commas where necessary. write "i" for identifying, "ni" for non-identifying and if the relative can be omitted ot not.
e. g. 1. mr cross, ..who.. lives next door, broke his leg last week. — ni, not omitted.
2. that's the woman drives the school bus. —
3. my sister is called sarah is younger than i am. —
4. the cake was covered in chocolate was delicious. —
5. i know a boy mother is a builder. —
2. That's the woman who drives the school bus. — Identifying (not omitted)
3. My sister, who is called Sarah, is younger than I am. — NI (can be omitted)
4. The cake which was covered in chocolate was delicious. — I (если тортиков было несколько), not omitted
5. I know a boy whose mother is a builder. — I (not omitted)