Герундий или инфинитив? Упражнения

Which is correct: V-ing or infinitive?
1 It's late. I must ….now.
a) go b) to go c) going
2 I'm sorry but I got time… to you .
a) talk b) to talk c) talking
3 Ann is always in the kitchen.She enjoys…
a) cook b) to cook c) cooking

4 We've decided…. away for a few days.
a) go b) to go c) going
5 Would you like…to me on Sunday?
a) come b) to come c) coming
6 That bag is too heavy. Let me… you.
a) help b) to help c) helping