Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.
_____ to school this morning, I met a friend of mine.
―Iguessyouwereinahurry.Look! You_______ yoursweaterinsideout.
She ______buy her clothes through the Internet than in the supermarket.
―Would you like some more tea? ―____ , please.
Though she has achieved great success, she has never felt with it.