Complete the sentences with the correct forms of the verbs in brackets.
1. It's nice to see that they _________________________(to talk) to each other now.
2. The Beatles _________________________(to sing) 'Help' in 1965.
3. Rembrandt _______________________________(not / to paint) the Mona Lisa.
4. I saw the beach while we __________(to drive) to the hotel.
5. Our country ____________________(not / to have) any forests by the year 2050.
6. If he _________________(not / to be) careful, he'll lose his money
7. You ____________________________(not / to be) rich if you don't study.
8. I stopped ___________________ (to worry) about the weather a long time ago.