Be sure to get there on time, ______ you? — Of course, we ______.

He has collected ___ sixhundred dollars

Would you please tell me_______ to do with all the problems, Mr. Chen — No problem.

People should be cautious ______theirpersonal information when surfing the Internet so as to prevent certaincomputer viruses ______ it.

Facts prove that the world’s economic development is not a win-lose game but one in which all ______ be winners.