._____the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life.
They worked hard_____they finished their work ahead of time.
His speech made_____deep impression on the audience that they could hardly forget it.
_____everybody is here, Let’s begin our meeting.
He must have passed this way, _____here are his footprints.
“Why can’t you do it now?” “_____I’m too busy.”