She brought with her three friends, none of __________ I had ever met before.
_____ in a poor family made Jack very hardworking when he was still young.
Mrs. Brown was very disappointed to see that the washing machine she had had _____ went wrong again.
Will you see to _____ that my children are taken good care of while I am away?
— What is your new friend like? — ________.
So difficult ________ it to live in an English-speaking country that I determined to learn English well.