问题
选择题
In the past few years, we _____ about three thousand English words.[ ]
A. learnt
B. was learning
C. have learnt
D. had learnt
答案
答案：C
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In the past few years, we _____ about three thousand English words.[ ]
A. learnt
B. was learning
C. have learnt
D. had learnt
答案：C