单项选择题

The moon, being much nearer to the Earth than the Sun, is the ______ cause of the tides.

A．principal
B．basic
C．initial
D．elementary
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单项选择题
Bus services between Town Centre and Newton Housing Estate will be ______ until the motorway is repaired.
A．discontinued
B．suspended
C．halted
D．ceased
单项选择题
In spite of the treatment, the pain in his leg grew in ______ .
A．gravity
B．extent
C．intensity
D．amount
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