Miss Green didn’t tell us    in 2002.

—Lin Kai, hand in your homework, please.
—Oh, sorry. I        it at home this morning.

I called you, but nobody answered. Where        you?

Zhengzhou Subway Line 1 which is 26.2 kilometers long       into trial operation (试运营) on December 26th, 2013. It has eased (缓解) the traffic pressure greatly.

I don’t understand        such a silly question in class yesterday.

—A nice tie! A present?
—Yes, it is. My aunt       it to me for my last birthday.