单项选择题

______ the 2012 Olympic Games will be held in London is not known yet.

A. whether
B. if
C. whenever
D. that
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单项选择题
Magicians ______ use techniques from science and the arts to deceive the mind and eye.
A. generously
B. genetically
C. cleverly
D. subsequently
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Nowadays, a lot of young youngsters are still depended ______ their parents, even after they have grown up.
A. to
B. with
C. on
D. over
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