— do you know so much about the UFO?—I usually get the information by surfing the Internet.
We may meet all kinds of difficulties in the future, but we should be confident enough to any challenge.
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.