单项选择题

Tests have proved that caffeine affects the body by increasing the heart rate and rhythm, which______ affects the circulatory system.

A．in the long run
B．in turn
C．in return
D．as a result
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单项选择题
Memorization which does not include thinking and understanding______ students being unable to use what has been learnt.
A．results in
B．centers on
C．adjusts to
D．refers to
单项选择题
Charles Ives's music was hardly popular with the broad public at the time it was written. The composer found it ______impossible to his music performed.
A．anything but
B．nothing but
C．none but
D．all but
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