—Must I pay for the bill now, boss?—No, you __________ pay for it after the meal.

That notebook _____  John’s. It has his name on it. 

－Would you like something to drink?－No, thanks. I __________ a glass of water just now. 

I think that's unlikely to happen, but if that ______ occur, both America's and China's interest would be severely damaged.

 —________ I swim here?—I’m sorry. Children _______ swim alone here.