By _____ coincidence, oil paints were developed at the time when ____technique of perspective was used.A. a ; the B \ ; a C. \; the D. a; a
The history of nursing ___ the history of man.
– Do you enjoy listening to records? --- I think records are often ______ an actual performance.
– Does this bus go to the 84th street? --- No, 30th street is _______.
_______, you can stay the whole summer.
My glasses cost me ______ the lost pair that I bought.