A few years ago the belief became general orange juice and milk should never be drunk at the same meal.
A. which
B. that
C. and that
D. what
网友回答
A. which
(答案→)B. that
C. and that
D. what
解析：通过分析句子结构，可知这个句子中包含一个同位语从句，且引导词在从句中没有作任何成分，也没有实际意义，故只能用That。