It ____ we had stayed together for a couple of weeks ____ I found we had a lot in common.

________ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.

 She spent ________ much time playing Majiang that she didn’t get enough sleep . 

—I finished all my work today． —If____, you can help others with their work．

You have failed two tests. You’d better start working harder, ____ you won’t pass the course.