Good morning class!!A. Hello B. Good morning Li Lei C. Good morning Miss Fang

问题补充：

--- Good morning, class!!

A. Hello B. Good morning, Li Lei C. Good morning, Miss Fang

答案：

解析：回答good morning时，也应该用good morning，故将A排除；根据class，可知应该是老师和学生之间的问候，故用Miss Fang。所以本题选C。