Will you come over to Beijing for the may Day holiday? —I’d like to, but my family the 2010 World Expo in Shanghai during the holiday

There is still a long way to go to work out all the problems ________ conservation of natural resources.[ ]

She came in for coffeeand told me traffic kepther awake last night

The witness who appeared in court ____ to speak out the truth instead of covering it up

依次填入下列各句横线处的成语，最恰当的一组是：① 都说“三百六十行，行行出状元”，这话不假。青年人经过专业化的学习，都会成为 _________，所以不必鄙视职业技术学院的毕业生。② 三人当初合资创办企业的时候投入资金多少差异很大，所以在年终分红之时就有人提出来不能_________，要有所区别。③ 清华大学偏工程性、技术性、应用性，所以清华大学工程院院士多；北京大学偏理论性、科学性、基础性，所以北大科学院院士多。两所大学都是国内顶尖级的，_________ 。