填空题

What does the word "otherwise" mean here in line 7

【参考答案】

If it (betta). does not have such a special organ.
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单项选择题
A．Supermarkets provide cheaper foods.B．There is less delay in choosing in supermarkets.C．Food and meat are more clean and more tasty.D．Air-conditioning is at different temperatur
A．Supermarkets provide cheaper foods.
B．There is less delay in choosing in supermarkets.
C．Food and meat are more clean and more tasty.
D．Air-conditioning is at different temperatur
填空题
How does the betta breathe air
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