Choose the correct variant to complete the sentences. All the sentences are in the past perfect.

1. The waiter served something that we _________________ .

• had not ordered
• had not order
• hadn't ordering

2. He went to Alaska where he ______________ before.

• had not been
• not had been
• hadn't be

3. When they came home, Sue ______________ dinner already.

• is cooking
• has been cooking
• had cooked

4. His mother was angry because he _____________ her with the shopping.

• has not helped
• had not helped
• did not help

5. She ____________ tennis before that day.

• had not played
• has not been playing
• has not played