－Could you tell me________ yesterday－I went bike riding with my classmates.

litter in the street in Singapore, youcould be arrested

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。

Professor Williams keeps telling hisstudents that the future to thewell- educated.

The shopkeeper gave us ______ weight: we got 9 kilos instead of 10 kilos. [ ]