问题描述：
1.for most people in China the bike is still their main m___of transportation.
2.---mum,what type of bike should i buy?
---choosing the right bike d___ on what you want to use it for.
3.---how do you think i can travel around beijing?
---you can take the s___.it is safe and cheep.
4.---mr.zhang,how is my daugter getting on at school?
----don't w___about her.she is doing quite well at school.
2.---mum,what type of bike should i buy?
---choosing the right bike d___ on what you want to use it for.
3.---how do you think i can travel around beijing?
---you can take the s___.it is safe and cheep.
4.---mr.zhang,how is my daugter getting on at school?
----don't w___about her.she is doing quite well at school.
问题解答：
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