题目内容：

He knows _______ China.A many about B much about C lot of about D a few about

优质解答

应该选B.
知道的内容是不可数的,所以排除A,D (many 和 a few都是修饰可数名词的）
C中词组使用有误,应该为 a lot about China
所以选B.