The umbrella is used ______ us away from the rain.[ ]

The teacher told us how to solve this problem and ___.

Tom, you look tired this morning. What’s wrong? —I was so busy that I didn’t go to bed _______ 12 o’clock last night. [ ]

_______ do you read English newspapers? —I read 21st Century every day. [ ]

_____________have you been away from your hometown,Janet? —since 5 years ago. [ ]