问题
选择题
It has been proved _____ eating vegetables in childhood helps to protect you against serious illnesses
in later life. [ ]
A. if
B. because
C. when
D. that
答案
答案：D
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It has been proved _____ eating vegetables in childhood helps to protect you against serious illnesses
in later life. [ ]
A. if
B. because
C. when
D. that
答案：D