【单选题】 Female sea turtles, before laying (her) eggs, swim (as much) as 2,000 kilometers (to return) to the beaches (where)they themselves were hatched.
A．her
B．as much
C．to return
D．where
网考网参考答案：A
网考网解析：
将形容词性物主代词her改为their，与复数名词turtles呼应。
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