Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.
She has tried her best. Please don’t be too ______ about her job.
______ abroad for more than two years, he returned to his hometown.
——Shelooksveryhappy.Shehavepassedtheexam. ——Iguessso.It’snotdifficultafterall.
The fact that so many people still smoke in public places____ that we may need a nationwide campaign to raise awareness of the risks of smoking.
MaybeifI_____ science,andnotliteraturethen,Iwouldbeabletogiveyoumore help.