It is the prevention of disease ________ its successful treatments that has led to the rapid increase of the world’s population.
One day we will manage to ______ the world ______ this terrible disease—cancer.
At weekends in Chengdu, you can often see many people ________ outside some restaurants,__________to have dinners
The laboratory was well ______ for atomic research.
A poet and artist ______ coming to speak to us about Chinese literature and painting tomorrow afternoon.
The president spoke at the business meeting for nearly an hour without ______ his notes.