[問題]GWD1- Q24

由 **iamdior** » 2004-12-31 16:50

Q24:
By sucking sap from the young twigs of the hemlock tree, tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop prematurely.

A.tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop
B.tree growth is retarded by the woolly adelgid, and this causes the color of needles to change from deep green to grayish green, and their dropping
C.the woolly adelgid retards tree growth, which causes needles to change color from deep green to grayish green, and dropping
D.the woolly adelgid retards tree growth, causing needles to change color from deep green to grayish green and to drop
E.the woolly adelgid retards tree growth, and this causes the color of needles to change from deep green to grayish green, and the their dropping

看過之前的討論還是分不清楚
,which和V-ing的區別..

可以告訴我媽??

感謝~