问题详情

There are twelve ，February has (51) days．A leap year comes once in four years．
There are 365(52 ) in a year．
There are (53) days in a week． They are Sunday， Monday， Tuesday， Wednes-day， Thursday， Friday and Saturday．
The parts of the day are: morning，(54) ，evening and night．
April，June，September and (55) have thirty days．
All the rest have thirty-one days， except(除……之外)February alone(只、仅)．
46．______