___ is known to all, China is a developing country, belonging to the third world.
________about the poor state of students’ physical fitness,the education ministry has urged local departments to increase spending on physical education.
________with the new machine,a search party went into the cave,hoping to find buried treasure.
It is________of you to turn down the radio while your sister is still in bed.
_____into English, the sentence was found to have an entirely different word order.
Sarah pretended to be cheerful,_____nothing about the argument.