用所给词的适当形式填空。
My aunt goes shopping ____________(two) a week.
A lot of ____________ (visit) visited our school last year.
Mary had much fun ____________ (play) at the aquarium with her mother two weeks ago.
I think math is the ___________ ____________ (important) of all the subjects.
Please don’t forget ___________ ____________ (finish) your homework first.