“坊巷桥头及隐僻去处，俱是铺席买卖。”这则史料反映的商业繁荣的景象最可能出现在 

《守株待兔》这则寓言告诉我们（    ）

草履虫进行呼吸的结构是（  ）

选出相对应的答语。

①Do you like summer?  ____                     A. They're kites.

②Can you play in the park in spring?____  B. I like rabbits.

③Would you like an ice cream?____           C. Yes, we can.

④What do you like?____                             D. We can eat fruit.

⑤What can we do in autumn?____              E. Yes. I like summer.

⑥What are they?____                                  F. Yes, please.