单项选择题

Doctors sometimes ______old cures when modem medicine doesn’’t work.

A．fall on
B．fall down on
C．fall back on
D．fall in upon
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单项选择题
With hundreds of works left behind, Picasso is regarded as a very ________ artist.
A．profound
B．productive
C．prosperous
D．plentiful
单项选择题
Britain’’ s press is unusual______ it is divided into two very different types of newspaper: the quality press and the popular press.
A．in how
B．in what
C．in which
D．in that
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