用所给词的适当形式填空
(1)Autumn is a____(wonder)season.
(2)We all hope____(have)a long holiday.
(3)I____(buy)a new car the day before yesterday.
(4)I like doing some____(shop)with my parents.
(5)He did some____(read)last night.
已知a是真分数,那么a2与2a的大小关系是( )