一道托福真题(语法),求救!!!

summer_ice (夏日之冰)
The lenses in an optical microscope bend the light passing through a specimen to form an image of that specimen that is much larger _____actually viewed.
(A) than it
(B) than the one
(C) one than
(D) than one which

答案是B,为什么呢?A 为什么不对???
(#142278@0)
2001-7-23 -05:00

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