Wstaw zaimek względny, ale tylko tam gdzie to konieczne.

1. There are a lot of things ______ she has to arrange.
2. There is one problem_____ must be discussed.
3. Where are the papers _______ I put on the table?
4. The house_____ they are going to buy has five bedrooms.
5. The bill _____ we got today must be paid within eight days.
6. Is this the book______ you wanted to read?