问题
选择题
One of the difficulties we have _____ English is how to remember new words and expressions. [ ]
A. to learn
B. in learning
C. learn
D. learned
答案
答案：B
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One of the difficulties we have _____ English is how to remember new words and expressions. [ ]
A. to learn
B. in learning
C. learn
D. learned
答案：B