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.