Answer:
What are we supposed to match them up with? all I see is (choose)
He wants his listeners to ponder is to struggle against tyranny, disease, war, and poverty. He summons everybody to participate and join in this goal.
Everything you need to make a good meaningful sentence (and grammatically correct, of course), is to follow common rules. Do not forget to provide your sentence with complexity, but you dont have to make them too complicated, I mean you need to use key words, they will make your thought completed. And the second point is that you need to properly organize the sentence using correct word order.
