VI. Образуйте прилагательные с -ful или -less от существительных и вставьте в предложения.

Решение:

1. This phone is old and useless. I can't call anyone.
2. Your advice was very helpful. Thank you!
3. It's completely careless to find my keys. I think I lost them forever.
4. Be careful with hot tea! Don't spill it.
5. The dog looked sad and helpless.

Ответ: useless; helpful; careless; careful; helpless.