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It can help to spread the UN's voice and promote communication between countries.
More than 80 countries.
Around April 20 every year.
The number of foreigners learning Chinese is becoming larger and larger.
It can help more foreigners know about Chinese culture.
Some museums allow students to visit for free on weekends.
She chose to walk to school rather than take the bus this morning.
If you don't study hard, you will fall behind your classmates.
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