My sister speaks English＿＿＿＿＿ if not better than my brother. A. as wellB. as well as C.

问题补充：

My sister speaks English＿＿＿＿＿, if not better than, my brother.

A. as well

B. as well as

C. so well

D. so well as

答案：

A. as well

(答案→)B. as well as

C. so well

D. so well as

解析：if not better than为插入语。