Which document outlines the basic political structure of the nation and settles the fundamental principles of the U.S.?

With the problem ___________, we are getting along even more smoothly. A: settles B: to settle C: settled D: to be settling

The old man ________ having arguments all the time with his wife. A: was sick of B: settles into C: fits in with D: stayed up

在顶升飞机之前，确保飞机的稳定性。 A: Make sure that the aircraft is stable before you lift it with jacks. B: Make sure that the aircraft settles before you lift it with jacks. C: Before jacking up aircraft make sure that aircraft stability is ensured. D: Before jacking up aircraft make sure that aircraft stabilization is ensured.