一道高中英语（句型转换）I think trying to stop the couple quarrelling is
一道高中英语（句型转换）
I think trying to stop the couple quarrelling is useless
I think it is( ) ( ) ( )to stop the couple quarrelling
I think trying to stop the couple quarrelling is useless
I think it is( ) ( ) ( )to stop the couple quarrelling
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你能帮帮他们吗