单选题
Some birds like to sit on a sheep because ______.
A、
they can eat its parasites
B、
they enjoy travelling with the sheep
C、
they depend on the sheep for existence
D、
they find the position most comfortable
【正确答案】
A
【答案解析】
[考点] 细节题
[解析] 从文章第一段第四句This is not because they want a ride，but because they find easy food in the parasites on sheep.可知它们想吃羊背上的寄生虫。
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