You'd better get all the work _________ before you leave.

At the Qiantang River on September 24th last year, the tidal bore, a name for a large column of water produced by the tide, _____ as high as 1．9 metres,       the start of the autumn flood period of the liver．

Charles Babbage is generally considered to _______ the first computer.

 —Excuse me，sir, where is Room 301?—Just a minute.I'll have Bob ________ you to your room.

________ with routine office tasks, she had no time to attend to her children.