Выбери правильный ответ:
1. David has five (fishes/ a fish/ fish) at home.
2. Tim will buy (this/these/those) pizza.
3. She (know/ is knowing/ knows) their address.
4. He (helps/ help/ doesn't helps) his parents.
5. (This/These) books are more expensive than (that/those) books.
6. (he/We) always helps (her/she) to do the task.