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。

Have you heard of such an experiment ________ wine experts were fooled into thinking a cheap bottle of wine was an exceptional one with the labels changed.

He promised ______his old friend during his stay inTianjin.

Of all the drinks , tea is ________ in the world .It has 5,000 years of history in China over.

It has been proved _________eating vegetables in childhood helps to protect you against serious illnesses in later life.[ ]