What _______ public is concerned about is whether medical workers and scientists will be able to find _______ cure for this new disease after the vaccine is tried on _______ volunteers.
Many Americans live on credit, and their quality of life is measured _________ how much they can borrow, not how much they can earn.
At present , the butter factory is still polluting the river though it _____to stop.
Looks are not ______. It’s what’s inside you that really matters.
It is ____comfort for ______patients to be close to their loved ones.
–Listen, my flight is being announced. I must be off now. --Bye.______________.