Ответ:

  1. Ann’s reliable. You can trust her and she always does what she says she will do.
  2. Helen’s insincere. You shouldn’t believe everything she says.
  3. Steve’s pessimistic. He always believes that bad things will happen.
  4. Tim’s generous. He usually helps poor people, giving them money.
  5. Dave is a very shy and blushes when strangers talk to him. (Грамматически естественнее: “Dave is very shy”.)
  6. Liz has many friends because she is very sociable.
  7. Sam’s selfish. He cares only about himself and not other people.
  8. Mark doesn’t get angry easily. He’s very easy-going.
  9. Bob is sociable. He likes meeting people.
  10. Tony is so stubborn. She never listens to anyone.

Перевод: надёжная; неискренняя; пессимистичный; щедрый; застенчивый; общительная; эгоист; спокойный и лёгкий в общении; общительный; упрямый.