12. it
15.
17. others
18. I, you, your
20. my
Sorry, I'm not sure about 15 but I hope this helps.
<span>Did you hear about the mathematician who wanted to make a fruit salad,s so he bought some apples and oranges and ordered pears.
Ordered pears under this context is a pun for ordered pairs, which explains that </span>the objects appear in the pair<span> is significant: the </span>ordered pair<span> (a, b)definitely different than </span><span>(b, a) unless a = b.</span>
Last one “He often gets sick”
this is late but here's the answer for anyone else who needs it:
D. it explains that it is necessary for the colonies to govern themselves.
Paradox
A fire department is a place where firefighters train but it's ironic beacuse it's being burnt down.
