B. Circle the correct word(s). 1. Is it true that Nina painted the house by hers / herself?

2. Richard got his university degree and Rita did either/too.

3. I'm hungry! Let's order a pizza, shall we / don't we?

4. You've put on weight lately. You had better/ might start going to the gym.

5. When / If it doesn't rain tomorrow, we'll go on a picnic.

6. You needn't/mustn't go to the supermarket. We have lots of food.