用所给单词的适当形式填空（每小题5分，满分5分）

小题1:I usually play basketball______ a week on Sunday.

小题2:Breakfast is the first______ in a day. It is very important.

小题3:Dongtou is very ________ for the seafood. I like my hometown very much.

小题4:I bought many things for_______ when I took a vacation in Changzhou.

小题5:If you really want to be a “Super Boy”, please_____ your best!

根据国际邮联规定，医药卫生科学研究机构封装严密并出具证明交寄的寄生虫以及供作药物或用以杀灭害虫的虫类禁止寄递。