问题
选择题
He has read many books on science, so it's easy for him _____ these questions.[ ]
A. answers
B. to answer
C. answering
D. answer
答案
答案：B
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He has read many books on science, so it's easy for him _____ these questions.[ ]
A. answers
B. to answer
C. answering
D. answer
答案：B