单选题
The sentence "they roll up into little balls" in the reading means ______.
A、
A. they sleep with little balls
B、
B. they play with little balls
C、
C. they make their bodies like balls
【正确答案】
C
【答案解析】
[解析] 根据文章第二段最后一句话:“当它们睡觉的时候,它们蜷成一团,像一个圆球。”故本题的答案为C。
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