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 turn
B. in return
C. turn back
D. as a result

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单项选择题
Many automobile accidents were () careless driving.

A. attributed to
B. resulted in
C. contributed to
D. raised from
单项选择题
It was surprising that the hotel that looked rather shabby outside was luxuriously and () furnished inside.

A. artificially
B. arrogantly
C. arbitrarily
D. artistically
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