Все достаточно легко, переводчик также в помощь:

1. A friend is a person who stands by you.

2. Friendship is a relationship which is important.

3. A neighbour is a person who lives near you.

4. Friendless is a person who has no friends.

5. A false friend is a person who can betray you.

Может быть, напутала первое и второе!