Large quantities of polluted water_____ into the sea so that lots of fish died.
To build a harmonious society, we all have a part to play in the fight ____ injustice, unemployment and crime.
This chemical material is very toxic. So put it ______ the children’s reach.
The central heating system of this office building is down and several workers ______ it right now.
China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it.
In recent years the consumption of aspirin _______ enormously in America. A was increasing B. has increased C. had increased D. will be increasing