单项选择题

To speed up the ______ of letters, the Post Office introduced automatic sorting.

A. treatment
B. delivery
C. transmission
D. departure

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单项选择题

First published in 1927, the charts remain an______ source for researchers.

A. identical
B. indispensable
C. intelligent
D. inevitable

单项选择题

Many women still feel that they are being______ by a male culture, particularly in the professional services sector.

A. held back
B. held forth
C. held on
D. held out

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