李子柒何以成为中国文化的“世界级传播符号”？
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1 . What did people think of smog in the past?
A.
It could promote the growth of microorganism.
B.
It could harm people’s health and the ecosystem.
C.
It could help iron solved in the water.
D.
It could help the Yellow Sea become cleaner.
2 . What does the underlined word “solved” mean in Chinese?
A.
沉没.
B.
解决.
C.
溶解.
D.
浸透.
3 . How can smog delay the global warming?
A.
Raise the growth of the fish.
B.
Change iron oxide change into iron.
C.
Promote the producing of the factories.
D.
Store more CO2 in the ocean.
4 . Why does the author mention the Yellow Sea?
A.
To prove smog also does good to the Earth.
B.
To prove smog helps to produce iron.
C.
To prove solid evidence for the change.
D.
To prove the close connection between factories.
