It’s very kind ______ you to show me the way.
-----Do you know ______ man under the tree?------Oh, he is _______ university teacher.
Which sign represents the meaning of saving water?
—You are late. The meeting _________ for about ten minutes. —I’m sorry. The traffic is heavy.
The high-speed railway linking Zhengzhou in Henan province to the western city of Xi'an in Shanxi province, started __________ January 17, 2010.
—Please remember _________water pipe when you don’t need water. —OK, I will.