Fill in the blanks with the correct relative pronouns: whose, who, which, that.

Here are the correct relative pronouns for each sentence:

1. He is a famous architect whose designs won an international award last year.
2. He is the one who the award should be given to.
3. This is Mary, who is taking over my job when I leave.
4. It's the invoice which you sent us last week.
5. He is the consultant whose advice I rely on.
6. The photocopier that has a two-year guarantee, costs Rs. 2000.
7. The people who were stopped at the border were all from Eastern Europe.