问题
选择题
.____on his novel, the author decided to adapt it into a play.
A．Basing
B．Based
C．To base
D．Being based
答案
答案：B
考查非谓语动词，be based on “基于”base与play为动宾关系用过去分词做状语。句意：这部戏以作者的小说为根据作者决定把它改编成戏剧。
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