将下列两个句子用定语从句连成一句.
例:therearemanypeoplehere.
theirclothesareold.
合成:therearemanypeoplewhoseclothesarenewhere.
1theboystudieshard.hisfatherisateacher.
2idonotknowher.youtalkedwiththewoman.
3hegivemeapen.ilostit.