English teachers are supposed ______their students a test in class, even after class, ______better teaching results.
________new buildings were going up everywhere in Beijing.
Voices were________as the argument between the two taxi drivers became more badtempered.
The exhibition gives local artists an opportunity to________their works.
It's really very dangerous. One more step,________the baby will fall into the well.
The manager has________to improve working conditions in the company.