题目

生物体是一个有机的整体，构成生物体各个结构也是非常严密的．如图有关各结构的关系的图示，表述正确的是（ ） A．B．C．D． 答案：D按要求完成下列各题【1】To learn everything is easy if you put your heart into it. (用it改写句子)____ ____ ____ ____ everything if you put your heart into it.【2】Do you have a favourite poem? Do you have a favourite song? (改为选择疑问句)Do you have a favourite ____ ____ ____？【3】Must I finish my homework now？(作否定回答)____，____ ____.【4】I think politics is more difficult than history. (改为同义句)I don't think politics is ____ ____ as history.【5】I spent two hours finishing my homework. (改为同义句)It ____ me two hours ____ ____ my homework.