Complete the sentences using the information in the brackets. Use the past perfect in negative sentences. Study the example.

Example:
We ate at a restaurant last night because I ____________ (buy) anything for dinner.

We ate at a restaurant last night because I had not bought (hadn't bought) anything for dinner.

Write only one option (one form).

1.  The man was hit by a red car. The driver [ ] (not/see) him.

2.  The apartment was dirty. They [ ] (not/clean) it for a long time.

3.  She [ ] (not/iron) her blouse. She looked a mess.

4.  Derrick was very tired. He [ ] (not/sleep) at all.

**5.**The house didn't fall down. Luckily, the termites [ ] (not/eat) all the floors as originally thought.