if i feel tired,(i go to bed)
用短语的适当形式填空
if i feel tired,___(i go to bed)
if i stay up ;ate,i___(feel tired)
if i feel hungry,i___(eat something)
if i eat too much,i____(get fat)
if i feel ill,i___(see the doctor)
if i am dirty,i___(have a bath)