Вместо точек вставьте одно из местоимений who, whom, whose, what, which:
1. ... knows his address?
2. ... would you like to drink?
3. ... would you like to drink: mineral water or lemonade?
4. ... of these cakes may I take?
5. ... is the coldest season of the year?
6. ... shoes do you want to buy?
7. ... way did he go?
8. Here are the books. ... is yours?

1. who.
2. what.
3. which.
4. which.
5. which.
6. what* (or: which**).
7. which.
8. which.

* Когда хотят узнать, какого рода ботинки хочет купить данное лицо.
* * Когда хотят узнать, которую из имеющихся пар ботинок хочет купить данное лицо.