单项选择题

She claims to be very learned in biochemistry, but in fact ______ she knows about it is all sadly out of date.

A. so little
B. that much
C. what little
D. how much
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单项选择题
China’s economic reform is aimed at separating enterprises from the government. It has been implemented for almost 20 years, but breakthroughs ______.
A. have been made yet
B. have yet to make
C. have yet to be made
D. to have yet made
单项选择题
Several trial efforts in the 1980s proved that it was financially ______ to restore old buildings.
A. feasible
B. probable
C. beneficiary
D. passable
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