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Task 17.Write the numbers.

1. 
   The Celsius freezing point — ___________
   
2. 
   Days in April — ___________
   
3. 
   An unlucky number — ___________
   
4. 
   Teeth in the normal human mouth — ___________
   
5. 
   The number of years in a millennium — ___________
   
6. 
   The number of months in a year — ___________
   
7. 
   Degrees in a right angle — ___________
   
8. 
   Minutesinanhour — ___________
   
9. 
   Legshasanoctopus — ___________
   
10. 
    The number of cents in a half-dollar — ___________
    
11. 
    Number of hours in a day — ___________
    
12. 
    Celsiusboilingpoint — ___________
    

Grammar

Prepositions of time

We use prepositions of time to say when something happens, happened or will happen. The most common ones are at, in and on. e.g. He goes to school at eight o'clock in the morning.

In	At	On
months: in September, in March, etc. seasons: In the winter/spring/autumn, etc. years: in 1996, in 1998, etc. centuries: in the 20th century in the morning/afternoon/evening expressions: in an hour in a minute in a week/few days/month, year	the time: at 7 o'clock holidays: at Christmas at Easter at the weekend expressions: at the moment at present at dawn at noon at night at midnight	days: on Monday on New Year's Day dates: on May 6th