研究表明，在人口老龄化过程中，许多国家普遍表现出农村人口老龄化程度高于城市的特点，即“城乡倒置”现象。读人口老龄化城乡差异转变模型图，完成下列问题。
在tl～t3阶段，人口老龄化城乡差异的主要成因是( )
| A．城市生育水平低 | B．城市人口寿命短 |
| C．农村死亡水平低 | D．农村劳动力迁出 |
“城乡倒置”给农村带来( )
| A．农村教育水平的下降 | B．农业现代化水平提高 |
| C．经济收入提高 | D．土地资源浪费 |
The most important _____ of his speech at the G20 summit was that we should all unite to fight against the finanical.
| A．element | B．spot | C．view | D．point |
He directed exposure to pigs,otherwise he_______pig flu.
| A．couldn’t get | B．wouldn’t have gotten | C．couldn’t have got | D．woud get |
In no time _______ me if he had any further information for pig flu..
| A．will he declare | B．he would notice | C．would he notify | D．he will note |
These plastic flowers look so _____ that many people think they are real,____they sell badly for the finanical crisis.
| A．beautiful,and | B．natural;while | C．artificial;though | D．real; so |
-----Hurry up. Xiao Shenyang is coming.
------ Oh, I was afraid that we_____.
| A．already miss him | B．had already missed him |
| C．will miss him already | D．have already missed him |