1 . _________ _________ you have finished your work, you’d better have a rest.
既然你已经写完作业了，你可以休息一下了。

3 . ____________________ Yuan’s hybrids have made him quite wealthy, one might think he would retire to a life of leisure.
鉴于袁隆平因开发杂交水稻而变得相当富有，有人会认为他会退休享受悠闲的生活。