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单选题
88.how to solve the mathematics problem, Stephanie asked her teacher for help.
A
A. Not known
B
B. Not knowing
C
C. Not to know
D
D. Not know
答案解析
正确答案：B
解析：
88.【翻译】不知道如何解答这道数学题，于是斯蒂芬妮向她的老师寻求帮助.【精析】B分析句子结构可知，空处应用非谓语动词。根据句意可知,Stephanie和know之间是逻辑上的主谓关 系，且句中没有明显的表示时间先后顺序的词，所以应用现在分词形式，表主动，其否定形式是直接在现在分词前面 加not。故选B。
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