模仿例句，用 but 或者 and then 将两句连成一句，注意句间逻辑关系。

例 1：Meat and fish are healthy. Too much meat isn't healthy.

         Meat and fish are healthy but too much meat isn't healthy.

例 2：I get up at seven o'clock. I go to school at eight o'clock.

          I get up at seven o'clock, and then I go to school at eight o'clock.