假定你是李华，你的美国笔友Mike写信问你对未来2050年生活的看法。下面是你回信的大致内容：

1.智能机器人已相当普及，并在很多领域代替人类工作；

2.医学方面已有很大的突破，已研制出防艾疫苗(vaccine n.)；

3.污染已得到改善；垃圾问题得到妥善处理；

4.对自然灾害的预测能力大大提高；

注意：1.词数100左右；2.开头和结尾已给出，不计入总词数；3.可适当增加细节，以使行文联贯。

Dear Mike，

    Thank you for your letter asking about my opinion of the life in 2050.

________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________

________________________________________________________________________________________________________________________________________

________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________