When did you first meet Tom?—The first day I came to this city，________，on May 2

You had better_____talk in class without permission.

You have done a good job in the English speech competition.—Thanks, but I wasn’t as calm as I _____.

Our math teacher is very kind ______ he looks veryserious.

依次填入下列各句横线处的成语，最恰当的一组是（ ）① 收入差别过大，造成骨干教师流失，对那些师资力量本就不厚实的普通学校而言，无异于___________。② 改革开放的成果越来越令人瞩目，许多来中国的人都有感于二十几年中国发生________的变化。③ 随着人事制度的不断完善，机关事业单位中__________的现象将大大减少，机关事业单位的工作作风将有很大的转变。