Complete the sentences with if or unless.
24 I won't be able to go out .....
I don't finish my homework.
25 Polar bears will lose their homes
we stop global warming.
26
we carry on using fossil fuels, we will run out of them soon.
27 Danny won't do well in the test .....
he studies a lot harder.
28 Poverty will never vanish
we do something about it.​