John, could you please the black-board now It’s your duty today.— OK. I’ll do it right away.

It has been raining every day so farI hope tomorrow will ________fine

依次填入下列横线处的词语，最恰当的一组是( )研究伊始，该团队选取了华北、西北地区生产的几十种马铃薯进行分析________，从营养成分、________、硬度等方面多次试验，________确定了适合加工马铃薯面条的两个品种。随后，又从诸多面粉种类中试验选取了______的小麦粉加以调试。

Could you please tell me something about the two ________ _________. They are exchange students of No. 1 Middle School.

_________thatdeveloped countries want to limit the development of the developing countriesin the climate conference in Copenhagen.