Hello, everyone:<br/><br/>I know we can say: <br/><br/><i>I lost the hat which I <b><font color="#3366ff">had bought</font></b>.</i><br/><br/><i>I lost the contact lenses I <b><font color="#3366ff">had bought</font></b> the day before.</i><br/><br/>But I'm wondering if we can say "<i>I lost the hat which I <b><font color="#ff6600">bought</font></b></i>." and "<i>I lost the contact lenses I <b><font color="#ff6600">bought</font></b> the day before."</i><br/><br/>Please give me your opinions, thanks!!!