What’s this— .

More and more high-rise buildings have been built in big cities _____space[ ]

“If you want to improve your study, you must be away from the computer.” Our math teacher says. “It means _________ you play computer games, _________ your study will be.”

I ________ you not to move my dictionary—now I can’t find it

When she was collecting rubbish in the morning， the cleaner saw a tall man in a black coat______outside the office．