First of all,I should do homework.改同义句 ___ ___ ,I should do homework.

First of all,I should do homework.改同义句 ___ ___ ,I should do homework.
First of all,I should do homework.改同义句 ___ ___ ,I should do homework.

First of all,I should do homework.改同义句 ___ ___ ,I should do homework.
First of all,I should do homework.改同义句 _At__ _first__ ,I should do homework.

At fi r s t

at first

First或To begin with; Above all

At first或者Above all（首先）