My gra ndfather is too old to care for himself, so my aunt is looking for someone to _____ him.

The weather in China is different from____

Pop music is such an important part of society______it has even influenced our language

Mr. Smith, would you please speak a little more_______-Sorry! I thought you could follow me.

The public ____ Yuan Longping, a great mind who has devoted himself to the research into hybrid rice(杂交水稻).[ ]