问题: 请教一道英语题，谢谢
1，The little boy was standing in the presence of his parents ,_______ lift his head, for he failed again in the exam.
A.daring not
B. not daring to
正确答案是B，为什么
还有几个问，in the presence of 是什么意思？
lift his head 是什么意思？
解答:
in the presence of “在场”
lift his head “抬头”
答案B正确，分词的否定式，not在结构前，固定用法。整个儿分词作伴随状语。
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