问题
选择题
Some children don’t know ________ for their parents.
A．what can they care
B．how can they care
C．what to care
D．how to care
答案
答案：D
题目分析：句意：一些孩子不知怎样关心他们的父母。宾语从句用陈述句语序，故排除AC。怎样照顾父母，故选D。
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