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热身词汇：
paleontology 古生物
gill 鳃
听力题目：
Q:What is the man doing?
A: He is having a heart-to-heart talk with the woman.
B: He is trying to make his points clear to the woman.
C: He is talking to the little baby who is several months old.
D: He is talking to the little baby who is still unborn.
