问题
单项选择题
Questions 15-18
A．The fruit sugar in oranges.
B．The fibre in oranges.
C．Vitamin C in oranges.
D．Calcium in oranges.
答案
参考答案：D
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Questions 15-18
A．The fruit sugar in oranges.
B．The fibre in oranges.
C．Vitamin C in oranges.
D．Calcium in oranges.
参考答案：D