Образуйте сложноподчиненые предложения, используя слова when, if, because 1.I knocked at the door. Susan opened it 2.Mr.Priestly

1. I knocked at the door when Susan opened it. 2. When Mr.Priestly saw me, he came forward to meet me. 3. We sat near the fire because the evening was cold. 4. If/When I was rather tired, I went to bed early. 5. If you are not warm enough, put on the eiderdown.