Решение:
Соединим слова и закончим предложения, образуя составные существительные:
- Miss Marple was an elderly lady-in-waiting.
- You should be more hard-working or you'll never pass your exams.
- It's not surprising that she works as a model - she is so good-looking!
- I haven't seen this house before, is it newly-built?
- School friendship can be a very long-lasting thing.