阅读理解Airisallaroundus．Itisaroundusaswewalkandplay．Fromthemomentwearebornwearesurrounded(围绕)byair．Whenwesitdownitisaroundus．Whenwegotobedairisa

　　阅读理解

　　Airisallaroundus．Itisaroundusaswewalkandplay．Fromthemomentwearebornwearesurrounded(围绕)byair．Whenwesitdownitisaroundus．Whenwegotobedairisalsoaroundus．Whereweareontheearthwearesurroundedbyairandweliveinair．

　　Alllivingthingsneedair．Livingthingscannotlivewithoutair．Wecangowithoutfoodorwaterforafewdaysbutwecannotliveformorethanafewminuteswithoutair．Webreathe(呼吸)inair．Whenweareworkingorrunningweneedmoreair．Sowebreathefasterthanusual．Whenweareasleepweneedlessair．

　　(1)

　　Fromthetextweknowthatontheearth________．

　　[]A．

　　thereisaireverywhere

　　B．

　　someanimalsdon'tneedair

　　C．

　　plantsneedmoreair

　　D．

　　sometimespeopledon'tneedair

　　(2)

　　Thewritertellsusthat________．

　　[]A．

　　thereislessairontheearththanonthemoon

　　B．

　　theearthiscoveredbyair

　　C．

　　theearthiscoveredwithwater

　　D．

　　thereisnoaironthemoon

　　(3)

　　Whichofthefollowingisthefirstimportantthingforpeople'slives?

　　[]A．

　　Water．

　　B．

　　Air．

　　C．

　　Food．

　　D．

　　Sunlight．

　　(4)

　　Whichofthefol