He smiled politely ______ Mary apologized for her drunken friends.
Peasants earn their living by selling agriculture ____ in China.
It was a matter of _____ would take the position.
When the teacher praised him for working out the math problem, Jack looked __________ about at his classmates.
You must come with us to the police __________ Our head is waiting for you.
The shop owner welcomed all the guests with a __________ smile.