A: Is that your physics teacher?B: That can’t be Mr. Lin. He to Hangzhou with his wife.
Millie is quiet and modest and easy________________.
She has finished typing but she doesn’t know _______ next.
The kind teacher devoted all her time ___________ her students.
— It’s dangerous to walk across the street carelessly. — You’re right. We can’t be careful while crossing the street.
It’s quite clever ________ you _______ out the problem.