单项选择题

The conference ______ a full week by the time it ends.

A. has lasted


B. lasts
C. will have lasted


D. is lasted
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单项选择题
May I______that you’ll sign the document
A．take
B．take it
C．take as D．take for
单项选择题
Henry Ford’s introduction of the assembly line vastly reduced the time it took ______a car.
A. in making


B. for making
C. on making


D. to make
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