My guess is that you�re asking how to type the apostrophies on the keyboard, so you get the solutions right in online exercises ...
There are more ways to do so; I found the most common one (on a German keyboard, I have to add... !) is to use the key left to the ENTER-key, in combination with SHIFT:
I don �t love Mondays.
I use the key left of the backspace key, the one that also produces �, � and the like ... :
I can�t resist chocolate.
To score any points you have to use the one that the author of the exercise used. You also see a slight difference in the outcome...
So I guess you best try various possibilities and see what works with your software :)!
Hope it helps, have a great evening,
Elisabeth.