Yao Ming, who ______ the Houston Rockets, is working hard to make his dream come true.

As a young man，he didn’t know that he       famous later on．

. This tower _______ back to 1860s and it is still in good condition.

Mr. Smith as well as his wife and daughter, _____  to their school twice.

While _____ to foreigners, you must try to make yourself _____ by using body language if necessary．

Rain is pouring down from the sky without any sign of stopping．Farmers begin to worry about their crops since it _____ as long as 24 hours．

Please tell me the after service of the computer; I’m worried about         a break down sometime.

--- What are you busy with?
--- The conference        in our city next week.

--- Thank goodness, you are here ! What ____ you ?
---- Traffic jam．

------ Have you seen your nephew lately?
------ Yes, in fact, I saw him yesterday. I ______ him for three years.