In the ceremony, our headmaster required students to improve our competitive awareness in modern society.
The next thing he saw was smokefrom behind the house.
Everyone in the village hoped that he would _______ after a few days’ treatment.
—Ready to give up guessing, Sandy? —No, no. Hold on! I think I _______ at the answer now.
He made a promisehe would not play computer games again at school.
Newly-developed materials for spaceships can _______ extreme weather conditions.