作业帮___help the people in the snowstorm in the south made him worried.A not known how to B unknown what to do to C His knowing not how to D his not knowing how to
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___help the people in the snowstorm in the south made him worried.A not known how to B unknown what to do to C His knowing not how to D his not knowing how to
___help the people in the snowstorm in the south made him worried.
A not known how to B unknown what to do to
C His knowing not how to D his not knowing how to
___help the people in the snowstorm in the south made him worried.A not known how to B unknown what to do to C His knowing not how to D his not knowing how to
选择D
因为句子中需要补充的成分是主语部分,所以应该选择一个名词结构
knowing是个动名词,known是形容词,不合适
截下来就是否定的问题了,针对非谓语动词的否定,not 放在非谓语动词的前面,即放在knowing的前面
所以选D
D his not knowing how to
动词做主语用ing形式 C里面not的位置不对，not应该在动词前
D
D
句子主干为（）made him worried，括号部分是主语，谓语为made。
括号部分要具有名词性质，AB明显不对，C选项的not位置不对。
希望帮到你！
选择D，这句话的意思是，他不知道如何去帮助南方的处于受暴雪之中的人们使他很苦恼。
D his not knowing how to
选D。
（His not knowing how to）help the people in the snowstorm in the south made him worried.
这句话的主体是：（....) made him worried， made前面要加一个名词性的主语。
“his not knowing...”是“他对于...的不知道”，是名词性的，所以选D。