1 He may/can come to the party but I'm not sure.
2 We all ought/should to take care of our health.
3 Can/Must I have a biscuit with my tea?
4 Would you like some/many milk in your tea?
5 There is too much/many cheese in the omelette.
6 I promise I'm going to help /I'll help you pack.
7 Kim will laugh/is laughing with a joke she has heard.​