跨入21世纪，我国进入了_______的新的发展阶段（   ）
①社会主义初级阶段  ②全面建设小康社会  ③加快推进社会主义现代化   ④实现共产主义社会 

阅读短文，判断正误。

Dear Joe,

How are you? My sister and I are having our holiday. Yesterday we went to the library. We got there by bus. We read storybooks and had lunch there. The food was delicious. It was cheap, too. We went shopping in the afternoon. I bought a pair of shoes. I was very tired. We are planning to learn skating and do many other things during the holiday. We are sure we'll have a good time.

How about your holiday? Please write to me soon.

Miss you.

Alice

小李想在国外购买一套80万美元的房屋，房子10个月后交费，房款在交房时一次结清。当时人民币对美元中间价为6.46，预计10个月后人民币对美元将贬值5%。但随着人民币加入了SDR(特别提款权)后，境外可以直接用人民币消费。随后小李与开发商协商用人民币结算房款。如果不考虑其他因素，小李这样做（  ）

①可以节省25.84万元人民币         

②可以节省27.2万元人民币             

③因为人民币具有世界货币的职能            

④可避免因使用外币结算可能带来的风险