I think it's ____useful advice 空中填不填冠词,如果填冠词,那么应该填什么

Think it over ,I think it's I think it's impossible I think it must___Lucy's. it's dark.I think it ( )soon No,boring,i,it's,think组词成句 I think it's very funny是什么意思 I think it's Li 一定要准确! It's to bad.I think ,意思? I think it's a bad Yeah?I think it's got character. I think it's older ,too I think it's good for me还是I think it's good to me 为什么? I think it 's full. means ( ).A:I think it's empty B:I think it's not emptyC:I don't think it's full D:I don't think it's empty 急 I think you can do it,it's not d___ I think it's Gary's改为否定句 I think it's he‘s book .改正 it's a nice day .i think s( ) ( )( )you think of art?I like it .It's re( )( )you think of art?I like it .It's relaxing