语法分册第174页的第37题

寂寞的自由

37． Seeming to be the only organization fighting for the rights of poor people in the South， Hosea Hudson，a laberer in Alabama，joined the Communist party in 1931.   
B--àE
（A）Seeming to be
（B）As
（C）In that they seemed
（D）Since it seemed
（E）Because it seemed to be
我想问大家的是，为什么D不对呢？谢谢大家的帮助

lizaz

D要变成Since it seemed to be 才对啊

寂寞的自由

那为什么不能理解成为SEEM后面的一个THAT从句呢？谢谢楼上朋友的再次解答