问题
Many people talk about “Didi”. I really wonder ___________________.— Just call to order a taxi through it on your mobile phone.
A:how I can use it
B:who uses it most
C:why people use it
D:what it is used for;
B:who uses it most
C:why people use it
D:what it is used for;
正确答案是：
同类题型
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