问题
选择题
ZhangHong appears _____ by heart 2000 words up to now.[ ]
A. to be learning
B. to have learned
C. to learn
D. having learned
答案
答案：B
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ZhangHong appears _____ by heart 2000 words up to now.[ ]
A. to be learning
B. to have learned
C. to learn
D. having learned
答案：B