請問GWD-12-Q41

[lsyryan]

The first English settlers to establish a permanent colony in America did it not at Plymouth but along the shore of the James River west of Chesapeake Bay.

A. it not at Plymouth but
B. so not at Plymouth but
C. not at Plymouth but instead
D. not at Plymouth but did so
E. it not at Plymouth but rather


這題答案是B 其中SO的意義是啥??

[dibert8]

這裡有
viewtopic.php?t=6205