I've read one of his plays ________ a lot of his poems．

A.but

B.while

C.as well as

D.as well

答案及解析： C

解析：

因A、B都为转折连词，故不合句意。D项“as well”搭配不完整。句意为：“我已经读了他的一个剧本和他的许多诗。”