单项选择题

It is the earth's 40 mile deep crust with __ we are concerned when we seek the cause of earthquake.

A．that
B．what
C．which
D．whom
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单项选择题
Many live in Hawaii, more than __ of whose people boast on Asian orPolynesian heritage.
A．two-thirds
B．two-third
C．second-third
D．two-three
单项选择题
__ I go on holiday, I always seem to be unlucky with the weather.
A．Where
B．How
C．Whenever
D．While
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