Underline the correct word. (Подчеркни правильное слово.)
1 A: Would you like to buy an animal adoption certificate?
B: Yes, I certainly can/would.
2 A: I use silver paper to wrap my packed lunch.
B: You really shouldn't/can't use silver paper as it produces waste.
3 A: Must/May I use a reusable lunchbox instead?
B: Yes, of course.
4 A: Should/Would you like me to take the vegetable waste out to the compost heap?
B: No, you mustn't/don't have to. Your brother has already done it.
