问题
选择题
Canada's economic wealth is closely linked to _______ of the US, which buys three-quarters of its exports.
A．which
B．what
C．that
D．one
答案
答案：C
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Canada's economic wealth is closely linked to _______ of the US, which buys three-quarters of its exports.
A．which
B．what
C．that
D．one
答案：C