250.Mr. Brown works in_________middle school. It is_________school built in the 16th century.

Sorry, I’m late. The car _________down on my way here.

You may take _________ half of the cake; they’re exactly the same.

Water, which seems so simple and common, is_________makes life possible.

_________was reported in the paper, more than one hundred miners were saved.

--- Hello, everyone! Have you heard the meeting will be put off till next Tuesday?

--- That’s what we_________about when you came in.

26．Museums in Beijing are on the move, _________exhibits that entertain and educate.

．When you look for a job, it’s not your book knowledge but your experience        ________matters more.

Danby left a message with the professor_________he would call again in the afternoon.

This year, many Chinese people turned to flowers instead of paper money to have a green Tomb-sweeping Day ______ memory of their lost relatives.