But for friction (摩擦力), people ______ neither walk, nor even stand up.
---What did Tom say? ---He told me he would leave for Paris .
---How are you with your new classmates? ---We often help each other.
Do you believe in the old saying “A friend need is a friend indeed?”
I found difficult to make good friends with them.
The folks were delighted at the message of their relatives _______ that mine explosion.