There was ________ rain in Beijing this summer.
It’s a good habit of doing your homework _________ you come home from school.
Liu Xiang trained so hard ______ he hurt his foot.
– Will teachers _____ by computers in the future, Tony?–Maybe yes, maybe no. But I’m sure we’ll learn from both of them.
The story of this book______ how young people love each other.
Your computer will go wrong if you _____ games too often on it.