Theweather was stormy, so she had to fly at approxmately 3000 meters.
Goingthis high, the plane used up gas quickly.
Whathappened to Amelia Earhart ? No one knows for sure. During the flight, shelikely headed in the wrong direction because the sun was bright and it was hardto see.
thishigh作什么成分呢？另外，这里的see 没宾语，是不是有误？
going this high 中，high为副词，修饰going。this在此为程度副词，修饰high。this high=这么高。又如，It isunbelievable that he should run this fast. this和that都可以用作程度副词，修饰其它形容词或副词。
and it was hard to see. 这里to see是不及物动词。不定式to see为真的主语，it为形式主语。《韦氏高阶》see作不及物动词的例句：It was so darkthat I couldn't see.
