─It’s said that sandstorms seldom hit that area, they?─_______,but things are different now.
Many students ____________ chances to show themselves in class because the class size is too big.
—Mr. Li will check our homework this aftemoon. ________ you ________ it?—Not yet. I'm doing it right now.
He never works hard. ____________, he failed.
He was brave enough ___________ for the school volleyball team and succeeded.
My parents want me to get further study to be ________ an engineer _______ a scientist, ________ I would like to be a famous surgeon doctor.