1. The girl _______ is sitting in the chair is a good singer. 2. The skirt _(_________ Mary bought two years ago is old. 3. Is this the novel __________ you introduced to me? 4. Where is the boy _______ broke the window? 5. Luckily none of the people_________ I know were killed in the earthquake.

who/that

which/that)

(that/which)

who/that

(that/whom)