It’s necessary for human beings to breath _______ and plants can produce it.A．CO
题型：不详难度：来源：
| It’s necessary for human beings to breath _______ and plants can produce it. |
答案
| C |
解析
| 根据常识对于人类而言呼吸氧气是必要的，植物能产生氧气，故选C。A是二氧化碳，B是氢气，D是氮气。 |
举一反三
In ancient China, Huabiao was set up to encourage people to carve _______ on.| A．their names | B．the good things | C．the Emperors’ names | D．their suggestions |
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_______ is the largest fresh lake in China.| A．Dongting Lake | B．West Lake | C．Poyang Lake | D．Tai Lake |
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In Australia, after you do something well, “______” will often be said to you.| A．Well done | B．Good job | C．Good on ya, mate | D．congratulations |
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_________is the Chinese tradional holiday.| A．Father’s Day | B．Teachers’ Day | C．Christmas | D．the Mid-autumn |
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________is the largest freshwater lake in China.| A．Dongting Lake | B．Poyany Lake | C．Qinghai Lake | D．Hongze Lake |
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