Give the correct form of the verb in the brackets.
1. People always (blame) ...... their circumstances for what they are
2. They didn't permit (camp).... in this wood
3. Mrs White (walk).... home from work when she saw the child fall off the bridge
4. I was just about (leave).... the office when the phone rang
1. are...blaming
2. to camp
3. was walking
4. to leave
1 are always blaming
2 to camp
3was walking
4 to leave