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Part 1:

1. Sam will pass his driving test unless he drives too fast.
2. They'll be here soon unless their plane is delayed.
3. If you're not in a hurry, you could take the bus instead.
4. Unless the factory increases its production, it will close down.
5. Unless I hear from you, I'll meet you at six.

Part 2:

1. if
2. if
3. if
4. in case
5. in case
6. in case
7. in case