Some students have trouble grammar while others have difficulty new words.A. in; rememberB

问题补充：

Some students have trouble grammar while others have difficulty new words.

A. in; remember

B. for; to remember

C. on; remembering

D. with; remembering

答案：

A. in; remember

B. for; to remember

C. on; remembering

(答案→)D. with; remembering

解析：词语搭配。 “做某事有困难”have trouble with sth, have difficulty (in)doing。 Sth 。 句意：一些学生学语法有困难而其他学生记单词有困难。