问题
选择题
How many ____________ and ____________ are there in the pencil-case?[ ]
A. pens, pencils
B. pen, pencil
C. pens, pencil
答案
答案：A
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How many ____________ and ____________ are there in the pencil-case?[ ]
A. pens, pencils
B. pen, pencil
C. pens, pencil
答案：A