______ has recently been done to improve the conditions of elementary schools, a great number of children are unable to go to school

She feels unhappy, _____

There was no doubt ____ it was in the supermarket _____ I lost my wallet yesterday

My boss often made me work day and night.- If I _______ you, I _______ the job. [ ]

Now the Internet is a popular channelthe public voice their opinions and show their strength.