一些不懂的英语题，高手速来！！！

Question

1------by the snake，the little girl crying loudly。
填Frightened，请解释
2I hurried to the airport only to find the plane I wanted to take-------
填had taken off，请解释

Answer 1

1. 后句中漏了be 动词，is 或 was crying loudly.
Frightened by the snake 作为状语，形容的是主语 the little girl，并表达了因果关系，说明后句中为何 (is/was) crying loudly.
整句的意思连贯起来就是：
（因为）被蛇（的模样）吓了一跳，小女孩哭得很大声。

2. I hurried 表示了现在陈述的是过去发生的一件事，赶到机场之后发现我原本要搭乘的飞机“已经起飞了”
这个“已经”发生的时间比“我赶到机场”更早，所以用过去完成时 had taken off.
it's "the plane" that had taken off，从句中，the plane 是主语，I wanted to take 补语，had taken off 谓语。

Answer 2

1------by the snake，the little girl crying loudly。
填Frightened，请解释
小女孩the little girl 和 frightened 之间是被动的关系，小女孩被惊吓，所以用frighten的过去分词形式，表示被动语态
2I hurried to the airport only to find the plane I wanted to take-------
填had taken off，请解释
意思是我匆忙赶到机场结果发现我想要乘的飞机已经起飞。hurried是过去时，飞机起飞在过去的过去时间是过去完成时态，所以用had taken off . I wanted to take修辞the plane
had taken off 是the plane发出的动作。

Answer 3

had taken off是固定短语