GWD4的一道语法题。。真心看不懂。。

小c考托福

Charles Lindbergh, for his attempt at asolo transatlantic flight, was very reluctant to have any extra weight on hisplane, he therefore refused to carry even a pound of mail, despite beingoffered $1,000 to do so.

1. Charles Lindbergh, for his attempt at a solo transatlantic     flight, was very reluctant to have any extra weight on his plane, he     therefore[C1]
   

When Charles Lindbergh was attempting his solo transatlantic     flight, being very reluctant to have any extra weight on his plane, he[C2]

Since he was very reluctant to carry any extra weight on his     plane when he was attempting his solo transatlantic flight, so Charles     Lindbergh[C3]

Being very reluctant to carry any extra weight on his plane     when he attempted his solo transatlantic flight was the reason that     Charles Lindbergh[C4]

Very reluctant to have any extra weight on his plane when he     attempted his solo transatlantic flight, Charles Lindbergh[C5]
答案选E 。。 求详解啊！！

jiaoguitar

LZ觉得应该选什么？

小c考托福

我选的是a  但是其实是不知道怎么分析这道题的语法点

332

A是吧
完句，完句。所以错

therefore是副词，不是连词。

回答完毕