⑴What colour is her dress ?____              A、It's Mike's .

⑵What time is it now ?____                      B、It's white and black .

⑶Whose is this ?____                                C、They are apples .

⑷What are they ?____                              D、No , she isn't .

⑸Is your mother at home ?____               E、It's five o'clock .

①蓄洪防旱，调节区域气候

②控制土壤侵蚀，自然净化污水　

③鸟类的栖息地

④工业用水的来源

他们一共有多少张邮票?　　

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