. Can you tell me the name of the factory ___you paid a visit last week?

A. what B. which C. to which D. to that

2. We have two spare rooms downstairs, _____ has been used for more than two months.

A. but neither of which     B. none of which

C. but neither of them      D. none of them

3.Finally, the thief handed everything __he had stolen to the police.

A. which    B. what    C. whatever   D. that

4.His parents wouldn’t let him marry anyone ___ family was poor.

A. of whom   B. whom   C. of  whose  D. whose