Mary is standing by the window. She is my next door neighbor. =>Mary, who....
1.Mary is standing by the window. She is my next door neighbor
=>Mary, who-
2.I haven't got a key, so I can't get in
=>If-
3.Nobody must expect to be rich without hard work
=> Unless ...
4.What a pity you can't take part in our trip
=>I wish...
5.The air in this city isn't pure, so we aren't healthy
=>If...
6.I'm too poor to take a space trip
=>I'm not...
7.People don't trust him because he tells lies
=>If he...
8.Since he was careless, Tim lost his job
=>Because of ...
9.Let's go abroad for our holiday this year
=>Why...
10.I don't stay up late any more
=> I used to...