We often see the sign in a hospital.
—The air pollution is terrible. — It will be worse ________ we take action to protect the environment.
- Which of the two T-shirts would you like? - ________. I don't like their styles.
— He hardly spent any time on his subjects, _________? —_________, so he did badly in his lessons.
—The presidents of China and the USA had ________ interview a short time ago. —And it was ________ great success.
Our parents are always strict________ us,especially_______ our study.