第6题: [单项选择]______ makes many children feel astonished. A. Butterflies are insects B. Butterflies being insects C. Butterflies as insects D. The fact that butterflies are insects 参考答案:D 答案解析:[解析] 句子结构题。空格处是句子的主语,需要名词性结构,故A可先排除;而根据句意,让孩子们感到惊奇的是一件事实,一个真相,故只有the fact才可作句子主语,而that...insects是同位语