Although we have learned English for 3 years, we still have trouble _____ the new words. A. learn B....
2023-01-14 11:13:16 131次 2014-2015学年湖北咸宁嘉鱼城北中学九年级上第三次月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Although we have learned English for 3 years, we still have trouble _____ the new words.
A. learn B. to learn
C. learning D. of learning
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