单选Unit 4第 37 题：He seized every chance to break out of the Nazi _ camp.A.concentrationB.concentratedC.prisonD.prisoner正确答案：A第 36 题：America and China accepted the challenge to strengthen the ties that bind us, to cooperate for greater prosperity繁荣 among our people, and to _ for a more secure and just peace in the world.A.driveB.drift漂C.strive努力D.strife正确答案：C第 34 题：One of the most _ aspects of a society is that a large percentage of people, lead
