The United Nations is trying to free the world________the threat of war.
To their surprise, the boy’s wound was left ______.
— I think you should phone Jenny and say sorry to her.—________. It was her fault.
— We had ________ really cold February this year.-I can’t remember ________ spring when it snowed in Changzhou .
As a _______ rule, most flowers appear in spring.
_______ of the students here _______ from the countryside.