In Case or Unless?

1.  

1. Tom won't call you __________ you give him your phone number.
   1.  in case
   2. unless
2. Take a jacket with you ___________ it gets cold later on.
   1. in case
   2. unless
3. Be sure to ask for a receipt ___________ you need it later.
   1. in case
   2. unless
4. ___________ fire, press the red button.
   1.  in case
   2. in case of
   3. unless
5. Dad won't lend you his car __________ you promise to drive carefully.
   1. in case
   2. unless
6. The alarm won't work ____________ you turn it on.
   1.  in case
   2. unless
7. It's always a good idea to have a second key somewhere _____________ you lose the first one.
   1. in case
   2. unless
8. Here's the number to call _____________ emergency.
   1. in case
   2. in case of
   3. unless
9. Take your vaccination certificate with you _____________ they ask for it at the airport.
   1. in case
   2. unless
10. I'll see you at the meeting next week __________ it's cancelled before then.
    1.  in case
    2. unless

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Answer  1. unless  2. in case  3. in case  4.in case of  5. unless  6. unless  7. in case  8. in case of  9. in case  10. unless