单项选择题

According to this passage, the standardized measurements were first used ______.

A．when the steel beam was developed
B．when the Egyptians built the pyramids
C．when scientists wanted to make specific observation
D．when engineers designed microscopic measuring devices

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A．Walk around the comer to the next block.B．Take a taxi to the hotel.C．Telephone the hotel for directions.D．Wait in the candy store.

A．Walk around the comer to the next block.
B．Take a taxi to the hotel.
C．Telephone the hotel for directions.
D．Wait in the candy store.

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A．The police want people to use them to report crimes.B．They are very handy and useful.C．They are much cheaper than those years ago.D．People in Florida can call others on their car phones.

A．The police want people to use them to report crimes.
B．They are very handy and useful.
C．They are much cheaper than those years ago.
D．People in Florida can call others on their car phones.

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