初中英语课文
LOOKCAREFULYANDLEARN
MyfriendPailwillneverforgethisfirstchemistryteacher.Hewasalittlemanwiththickglasseslivelyandinteresting.Andhislessonswerenoteasilyforggeten.
Paulrememberoneofhisfirstlessonsfromthisteacher.Afterthestudentsinthechemistrylab,theteacherbroughtoutthreebottles.Onewasfilledwithpetrol,onewithcastorandouewithvinegar.Nowwathchcarefully,saidtheteacher.
Hethenfilledacupwithsomeofthepetrol,someofthevinegar.Asthestudentswatchedhimquietly,hemixedthethreetogether.Afterthat,hehelduponeofhisfingersandshowedittotheclass.Hethendippeditintothecup.Afterafewsecondshetookhisfingerout.Nowwatch,hesaid.remember,youmustdoeverythjingasido.
Heputafingerinhismouth,tasteditandsmiled,lookingratherpleased.Thenhehandedthecuparoundtheclassofstudentds.Eachstudentdippedafingerintothemixtureandsuckedit.Insteadofsmiling,eachofthemmadeaface.Themixturetastedterrible.
Whenthecupwasatlastreturnedtotheteacher,hesaidsadly,I'msorry,noneofyouwatchedcarefullyenough.Yes,Isuckedafinger,butthefingerIputintomymouthwasnottheoneIhaddippedintothecup.
ItwasPaul'sfirstimportantlessonasastudentofchemistryandheneverforgotit.
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