[单选题]question is______ can be put into practice.

A
how you have learned
B
how that you have learned
C
that why you have learned
D
how what you have learned
正确答案:D
题目解析
本句是表语从句套主语从句:The question is...is后面的成分为表语,由how引导的句子充当——how what you have learned can be put into practice.其中,嵌套了what引导的主语从句what you have learned(你所学的东西),整句话理解为:问题是你所学的东西怎样才能付诸于实践中。
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