1.(16.17)We seldom open the fridge.

  (18)We think what we want to take first, and then open the fidge.

It save off not only electricity but also time.

2.(16.17.18)We have kept the good habit for a long time.

3.(16.17)Because we live in lodging, we can’t do it.

  (18)I also can’t do it.

4.(16.17.18)It is easy to do .We just have to put the food into the fridge later.

5.(16.17.18)We wash clothes by hand . Sometime we use the washing machine when the clothes is too many.