Don’t keep the boy in class．

The research is so designed that, once _______, nothing can be done to change it.

Have you found the house for me, Ms Mary?——Yes, but I will tell you what trouble I had ______ your house on the way I came here

When she grows , she will grow a beautiful woman.

Every day the mother seems to be busy until 10 o’clock at night, ____the rest of the family have fallen asleep.