— What’s the matter? —I am having trouble __________ who has taken my book. A. finding B. finding ou...
2022-12-22 23:29:27 17次 2016届山东乐陵市九年级9月份月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
— What’s the matter?
—I am having trouble __________ who has taken my book.
A. finding B. finding out
C. looking for D. looking up
本题链接：
