题目内容

The boy did his homework with the help of his father in the past. But now he can do it alone.
A.for himselfB.on himselfC.by himselfD.with himself
C
for himself为自己; on himself靠自己;by himself通过自己,靠自己; with himself和自己。句意:在过去,这个男孩在他的父亲的帮助下做作业,但是现在他能够独自完成了。on himself前与搭配动词depend结合语境可知选C。
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