Jack almost fell off the cliff, but managed to _____ until help came.

Students should be ________ in class.Only listening without taking part in the activities is not good for one’s study.[ ]

Thank you for the reasonable plan that you put ________ to help improve people’s living level step by step

The first textbooks ______ forteaching English as a foreign language came out in the 16th century.

根据语境，下列排序最恰当的一项是（ ） 国家公祭日是国家为了纪念曾经发生过的重大民族灾难而设立的国家祭日。国家公祭日的设立是缅怀过去，更是扶慰民心、顺应民意的措施。国家公祭日的设立，________， ________， _____。_________，___________，共同以史为鉴、开创未来，__________，促进共同发展和时代进步。① 使人类历史记忆长久保持唤醒状态②是为了中国与世界更好地沟通．③一起维护世界和平及正义良知④是在向全世界表达我们热爱和平、维护和平的决心与责任⑤而避免出现哪怕是片刻的忘却与麻木⑥是在向全世界传递中华民族对于人权和文明的态度