A        friend is the one who you can trust and will not leave you alone when you are in need of help.

We should do what we can to save those_________ species, for example, the tiger, an animal which was considered_______ to humans.

At the age of twenty Steve left his hometown, _____ to return without making his mark.

 My parents want me to take ______ maths lessons at the weekend, but I want to relax myself.

The boy was      at the terrible story, which was written for adults.