We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.
More than one kind of English __________ all over the world.
Barbara is easy to recognize as she's the only one of the women who ______ evening dress.
I,____ your friend, will try my best to help you out.
The number of people who __________ cars __________ increasing in China.
Every possible means __________ to save the wounded soldier up to now.