i don't know which shirt i should buy的同义句 要以I don't know开头

i don't know which shirt i should buy的同义句 要以I don't know开头 i don't know what books i should buy for my son 的同义句 I don’t know what I should buy.(同义句)I don’t know _What to bu 英语语法问题I don't know which I should buy和 I don't know which on I don't know what i should do（同义句) I don't know what I should do 同义句 I want to buy a new T--shirt,but I don’t know _____.A.which i don't know的同义句 I don't know?的同义句 改为同义句：I don’t know what I should buy her. i don't know which bus i should take.(改同义句） i don't know which sportswoman i should support,同义句