题目内容：
As large numbers of Chinese flocked to Japan to pay thousands for toilet seats, it was a surprise to many people ____________ the smart toilet lids on sale in Japan were actually made in China.
A.whether
B.how
C.which
D.that
参考答案：
答案解析：
选择题：As large numbers of Chinese flocked to Japan to pay thousands for toilet seats,
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- 题目类型：选择题
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