The key answer of exercise 2

Student A

1. an even number, e.g. 2, 4, 6 ...
2. seven
3. no (they are a gift for lovers)
4. yellow, green and red

Student B

1. say no three times and then say yes. They open the gift in private.
2. later (after receiving it)
3. on their first birthday and 60^th birthday
4. gold jewellery