Решение:
- My granny was an actress when she was a young girl.
- I can't open the door. I haven't (not) got a key.
- I am (not) very happy today.
- It is 10 o'clock. You are late again.
- It's a nice town. It has got a very nice shopping centre.
Ответ: 1. was, was; 2. haven't; 3. am; 4. is, are; 5. has