Some students have trouble grammar while others have difficulty — new words.
A. in; remember
B. for; to remember
C. on; remembering
D. with; remembering
网友回答
A. in; remember
B. for; to remember
C. on; remembering
(答案→)D. with; remembering
解析：考查trouble固定结构。Have some trouble with sth；have some trouble in doing sth做某事有困难。句意：一些学生在语法方面有困难，而其它学生在记忆新单词方面有困难。故D正确。