Lisa failed in fighting against the boa at first just because ______ . ()
（A）she was worried about her own life
（B）the boa was so strong
（C）she was too old
（D）she was afraid that what she did would hurt her son
参考答案
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（A）she was worried about her own life
（B）the boa was so strong
（C）she was too old
（D）she was afraid that what she did would hurt her son
