If we __________ careful,fire can be dangerous。
We will have finished ________ Unit 15 by April. We can review all the lessons.
He is ________ to make money to support his parents.
The population of China is ________ than that of any other country in the world.
The bell is ringing. Hurry up, ________ you’ll be late for class!
Wang Lin reads books at the school library _______ the afternoon every day.