Ответ:

  1. My parents are installing new doors in their cottage.
  2. Mary is trying the sauce to see if it needs more ingredients.
  3. Harry is taking a bath.
  4. Our family are considering of buying a new flat.
  5. She is visiting her grandparents in two or three days.
  6. 'The Three Girls' is performing in New York this January.
  7. The cat is sniffing the food I have given it.
  8. They understand what the problem is.
  9. The jeans suit her all right.
  10. My sister seems to be bored.