how to express the idea in English, he turned to the dictionary.
A. Does not know
B. Not knowing
C. Knowing not
D. Not to know
网友回答
A. Does not know
(答案→)B. Not knowing
C. Knowing not
D. Not to know
解析：考查非谓语动词用法。He与know构成主动关系，所以使用现在分词的形式，其否定形式not要放在现在分词的前面。句意：不知道如何用英语表达自己的观点，他查了字典。