Once　upon　a　time,　a　young　man　was　standing　in　the　middle　of　the　town　announcing　that　he　had　the　most　beautiful　heart　in　the　world.　A　large　crowd　gathered,　and　they　al　praised　his　heart　for　it　was　perfect.
Suddenly,　an　old　man　appeared　and　said,　“Why　,your　heart　is　not　as　beautiful　as　mine.”
The　old　man’s　heart　was　ful　of　scars（伤疤）.　Some　pieces　of　his　heart　were　removed　and　some　pieces　from　other　people　were　put　in,　but　they　didn’t　fit　quite　right.　So　there　were　several　jagged（锯齿状的）edges.　In　fact,　there　were　stil　some　holes　in　his　heart　where　the　pieces　were　missing.
The　 young　 man　 laughed,“Comparing　yours　with　mine,　mine　is　perfect　and　yours　is　a　mess.”
“Yes,”said　the　old　man.　“But,　every　scar　shows　that　I　took　out　a　piece　of　my　heart　and　gave　it　to　a　person,　and　often　he　gave　me　a　piece　of　his　heart　in　return.”
“Why　do　you　have　some　jagged　edges　in　your　heart?”asked　the　young　man.“Because　the　shapes　of　the　pieces　weren’t　the　same.”“Then　the　holes?”“Sometimes　I　gave　pieces　of　my　heart　away,　and　the　other　person　hasn’t　given　back　a　piece　of　his,　so　… but　I　don’t　care.”“How　come?”“They　remind　me　of　the　love　we　shared.”
The　young　man　was　deeply　moved.　He　walked　up　to　the　old　man,　took　a　piece　of　his　heart　out　and　gave　it　to　the　old　man.
The　old　man　placed　it　in　his　heart,　then　took　a　piece　from　his　old　scarred　heart　and　placed　it　in　the　wound（伤口）in　the　young　man’s　heart.　It　fitted,　but　not　perfectly,　as　there　were　some　jagged　edges.
The　young　man　looked　at　his　heart,　not　perfect　any　more　but　more　beautiful　than　ever.
How　sad　it　must　be　to　go　through　 life　 with　 a　 whole　untouched　heart!
【小题1】　The　young　man　stood　in　the　town　to　_____.

 Laboratory　work　is　your　chance　to　learn　science　firsthand.　It　can　be　fun　but　you　must　be　careful　to　prevent　injury.　Listen　closely　when　your　teacher　reads　and　explains　the　rules　before　your　first　lab　lesson.

    LABORATORYRULES

    Throughout　the　lesson

    ·Do　not　enter　the　science　lab　without　the　teacher’s　permission.·No　food　or　drinks　are　to　be　alowed　in　the　science　lab.

    Before　the　Experiment

    ·Read　al　instructions　carefuly　before　every　experiment.

    ·Prepare　al　apparatus（仪器）and　arrange　them　so　that　you　wil　not　knock　them　over　while　doing　the　experiment.

    During　the　Experiment

    ·If　you　are　unsure　of　how　to　use　any　apparatus　or　how　to　operate,　ask　your　teacher　for　help.·Never　smel　or　taste　chemicals　unless　your　teacher　gives　permission.

    After　the　Experiment

    ·Wash　al　apparatus　after　use　and　return　them　to　the　places　where　they　were.

    ·Throw　waste　materials　in　proper　waste　baskets.　　　　First　Aid　　　　

    ·Report　al　accidents　to　your　teacher　immediately.

    ·If　you　spil（ 溅 出 ）any　chemicals　onto　your　body　or　clothing,　wash　with　plenty　of　water　and　report　to　your　teacher.

   1.　Your　teacher　wil　probably　tel　you　the　rules　above　_____　the　first　lab　lesson.

    A.　before　　　　　B.　since　　　　C.　during　　　　D.　after

2.　Before　every　experiment,　you　should　_____.

    A.　taste　the　chemicals　first

    B.　clean　al　the　apparatus

    C.　read　al　instructions　carefuly

    D.　report　al　the　accidents　to　the　teacher

  3.　When　you　are　not　sure　how　to　use　al　apparatus,　_____.

    A.　try　them　on　your　own

    B.　read　the　rules　carefuly

    C.　ask　your　teacher　for　help

    d.　put　them　back

 4.　It　is　clear　that　you　can　_____.

    A.　 bring　food　into　the　lab

    B.　enter　the　lab　anytime

    C.　smel　chemicals　as　you　like

    D.　learn　science　directly　in　the　lab

    5.　If　you　get　chemicals　on　the　clothing,　you　can　find　ways　to　solve　it　in　the　part　_____.

    A.　Before　the　Experiment

    B.　First　Aid

    C.　During　the　Experiment

    D.　After　the　Experiment