(1)It was not _____________he saw his mother that he realized how old she had become.
(2)Sometimes I wish I_____________(live) in a different time and a different place.
(3)The area has been badly _____________(affect) by pollution.
(4)He went back to the office____________he had left his keys.
(5)Today, we will begin_________we stopped yesterday so that no point will be left out.
(6)He was about to leave _____________the bell rang.
(7)I didn’t see your sister at the meeting. If she ______________(come), she would have met my brother.
(8)The man ___________talked to you just now is an engineer.
(9)He suggested that we ____________(leave) before sunset.
(10)The reason _________they have succeeded is that they are strict with themselves.