參考譯文：滅火器的通過冷卻或者減少火中的氧氣的方法工作的，大多數(shù)時(shí)候兩個(gè)方法都會(huì)用到。
10. The introduction of mass-production methods enabled many people _________ and gave them an unprecedented amount of mobility.
A. to purchase their own automobiles
B. their own to purchase automobiles
C. to their own purchase automobiles
D. own their automobiles to purchase
答案：A
分析：為固定結(jié)構(gòu)enable sb to do sth.
參考譯文：規(guī)模生產(chǎn)方法的產(chǎn)生，使得人們能夠買自己的車，并獲得了空前的靈活性
10. The introduction of mass-production methods enabled many people _________ and gave them an unprecedented amount of mobility.
A. to purchase their own automobiles
B. their own to purchase automobiles
C. to their own purchase automobiles
D. own their automobiles to purchase
答案：A
分析：為固定結(jié)構(gòu)enable sb to do sth.
參考譯文：規(guī)模生產(chǎn)方法的產(chǎn)生，使得人們能夠買自己的車，并獲得了空前的靈活性