_______air pollution getting worse, the government needs to come up with some effective measures to deal with it.
It is believed that high achievers are ambitious, hard working, and work toward personal standards of excellence ______ material rewards.
There is a common belief among the students in our school ______ they should try their best to learn and reach the peak of their academic performances.
— How is that, Jane?— I wonder ______ it takes to be a good teacher beyond patience and a great knowledge of students.
Meeting my teachers and fellow students after so many years was a warm occasion, ______ I’d strike into my heart.
The director was fully convinced that this moving story, if ______ for television, would be a hit.