根据提示用适当的介词完成句子。

1.—Where is the telephone?

    —It's n______ to the sofa.

2.—Where are the CDs?

   —They're on the desk, b________ the books and the TV.

3. Their bookcase is n________ to the table.

4. —Is there a desk b________ the bed?

   —Yes, there's a desk next to the bed.