求教 大全 25

yingmin0601

1.        A recent study of ancient clay deposits has provided new evidence supporting the theory of global forest fires ignited by a meteorite impact that contributed to the extinction of the dinosaurs and many other creatures some 65 million years ago.

(A) supporting the theory of global forest fires ignited by a meteorite impact that

(B) supporting the theory that global forest fires ignited by a meteorite impact

(C) that supports the theory of global forest fires that were ignited by a meteorite impact and that

(D) in support of the theory that global forest fires were ignited by a meteorite impact and that（B）

(E) of support for the theory of a meteorite impact that ignited global forest fires and

I choose A，BUT THE ANSWER IS B,why???

jnlvo

不知看过下面的注释没有，如果还没有弄清楚，再讨论。

http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=57755