选C
as well as 与动词连用时,其后可用V-ing形式,尤其as well as 位于句首时,此时相当于in addition to.例如：
As well as breaking his leg,he hurt his arm.
他不但摔断了腿,而且还伤了胳膊.
She sings as well as playing the piano.
她不但会弹钢琴,而且会唱歌.