As we all know, tigers are in danger of dying out.
________, you need to give all you have and try your best.
Before Sally left home, her mother kept telling her to ________ her manners at the party.
She has ________ that I find it hard to believe anything bad of her.
Either you or one of your students ________ to attend the meeting ________ tomorrow.
The big snow caused great ________ to the people living in the south of China, ________ some of them homeless.