The new books in the factory these days are mainly intended for children.
A. printing
B. to print
C. being printed
D. to be printed
网友回答
A. printing
B. to print
(答案→)C. being printed
D. to be printed
解析：选C 考查非谓语动词。句意：这些天工厂里一直在印的新书，主要是为孩子们设计的。分析句子结构可知，print与the new books之间是逻辑上的动宾关系，应用过去分词形式；又根据these days可知，此处表示这些天都在印这些新书。故C项正确。