was most important to her, she told me, was her family.
It is the prevention of disease ________ its successful treatments that has led to the rapid increase of the world’s population.
Nobody would like _________ because of their appearance.
Why is________ you are so late for the class?
Too high house prices can be brought under control,_______ the government introduces a series of regulatory policies.
.The fact has worried many people _____ the earth is becoming warmer and warmer these years.