John speaks English , if not better than, David.
A. as well
B. as well as
C. so well
D. so well as
网友回答
A. as well
(答案→)B. as well as
C. so well
D. so well as
解析：考查固定结构。固定词组as…as…和…一样；本句中的as well as表示“和…一样好”；句意：约翰讲英语如果不比David好，也是和David一样好。As well要单独使用，表示“也”；So well as要用语否定句或者疑问句中。故B正确。