— Did you inform Helen of the plan put forward at the meeting?— Of course. I saw her.
She found her calculator _______ she lost it.
You should make it a rule to leave things _______ you can find them again.
When you read the book, you’d better make a mark _____ you have any questions.
You should let your children play ______ you can see them.
Now he works in the factory ______ his father used to work.