搜 
I can help you if you have trouble () your homework.
科目名称：人文英语1
试卷号：23896
题型：词汇与结构(单选题)
题目：I can help you if you have trouble () your homework.
选项：A. in B. on C. to
需要1积分查看
答案：A. in
国开题库网
版权信息-国开题库网-www.guokaitikuwang.com    备案号 粤备65168151