题目

根据对话内容，从方框中选用合适的特殊疑问词填空 which, what, whose, who, when, where, why, how, how old, what time （1） — grade are you in,Millie?—I'm in Grade 7. （2） — is your new friend Amy?— She is 14 years old. （3） — do Daniel and David come from?— They come from the USA. （4） — do people in China celebrate the Mid-Autumn Festival.'?— They enjoy the bright moon and eat moon cakes. （5） — is your birthday,Sandy?— It's on October 5. （6） — pumpkin lantern is thi20．男性精子中所含的性染色体是（　　）A．XX 染色体B．XY染色体C．X染色体或Y染色体D．YY染色体