.As is _______ known, a good knowledge of basic physics helps us better understand natural phynomenons.
What a___it is that he remained alive after dropping from the roof of a ten-storied building
He hasn’t slept at all for three days.___he is tired out
The___between manual labour and mental laour is diminishing in some developed countries
—Where would you like to go to,the cinema or the theatre? —It___to me
My uncle’s house in the downtown ares is much smaller than ours,but it is twice___expensive