童谣：“一只蚂蚁来搬米，搬来搬去搬不起；两只蚂蚁来搬米，身体绕来又绕去；三只蚂蚁来搬米．轻轻抬着进洞里。”

解读童谣和漫画，从中你得到了哪些启示？ 

    Last weekend we had a birthday for our classmate Zhang Xiaohui. She is younger than me, but I am shorter than her. And she looks stronger. Of course she is heavier than me. We went to a shop to buy a present for Xiaohui. What did we buy? We bought a doll for her. Because she told me " I haven't got a lovely doll." When she got our present she looked excited. She was very happy. We went to the zoo. We saw elephants. We wanted to row a boat in Jingming park, but it was later, we had to went home. We had a good time on that day.

细胞内很多化学反应都是在生物膜上进行的，如图表示真核细胞中3种生物膜上发生的化学变化示意图．请回答下列问题：

Sam _______ a hamburger last night. （  ）