介词专项练习一选择合适的介词填空（每空3分，共15分）1).Christmas is _ (at, in, on) December 25th.2) What is the first lesson（课）_ (at, in, on) Tuesday? 3) Mr. Web will go to Shanghai _ (at, in, on) Oct. 22nd.4) He often plays football with his friends _ (at, in, on) Sunday.5)Children dont go to school _(at, in, on) New Years Day.二选择填空，并把其字母编号写在括号内。（每空3分，共75分）( ) 1. The girl usually practices the piano _ Saturday morning. A. on B. in
