问题
单项选择题
That helps to explain ( ). businesses are setting up Net sites even though profits aren't yet very big.
A．that
B．the reason for
C．why
D．why that
答案
参考答案：C
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That helps to explain ( ). businesses are setting up Net sites even though profits aren't yet very big.
A．that
B．the reason for
C．why
D．why that
参考答案：C