单项选择题

The seventeenth century was one (which) many significant (advances) (were made) (in both) science and philosophy.

A．which
B．advances
C．were made
D．in both
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单项选择题
Nearly (three quarters of the surface) of the earth (are) covered with water, and (there) would be even less land (if) the polar icecaps were melt.
A．three quarters of the surface
B．are
C．there
D．if
单项选择题
We (strongly) suggest (that) Smith (is told) about (his) physical condition as soon as possible.
A．strongly
B．that
C．is told
D．his
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