题目内容：
Americanhighschoolstudentspostonlyaveragescoresonakeyskillstestadministeredtokidsfrom65countriesacrosstheindustrializedworld.
Aftermorethanadecadeofcomparisons,U.S.students（1）justbelowtheinternationalaverageinmath,whichwasthefocusofthisyear'stest.
Thetest,giveneverythreeyears,examineshowwell15-year-oldscan（2）math,readingandsciencetoreal-worldsituations.
TheU.S.averageisabout（3）withcountriessuchasNorway,Portugal,Italy,SpainandRussia.OthercountriessuchasSingapore,FinlandandSouthKoreascoredwellabovetheinternationalaverage.
What'sperhapsmostsurprisingisthatafew（4）countriessuchasIrelandandPolandarenowamongthetopscorers,saysJackBuckley,commissioner(委员)oftheNationalCenterforEducationStatistics.Buckley（5）thatIrelandandPolandin2009scoredcomparablywiththeUSAbuthavenowdonebetterthanitinallthree（6）.
"Mathisournational（7）ateverysocioeconomic(社会经济的)level,"saysAmandaRipley,authoroftherecentbookTheSmartestKidsintheWorld,whichexamineswhyafewcountriesareperformingbetterthanU.S.studentsontestssuchasthePISA(ProgrammeforInternationalStudentAssessment国际学生评估项目),whileothernationssuchastheUSA（8）improve.
ShenotesthateventheUSA's（9）fourthofstudentsperformbelowtheirpeersin27othercountries."That'sa（10）pieceofdatathatshowsuswedohaveaprobleminmath--andit'snotjustourlow-incomekids."
A．apply
B．appoint
C．barely
D．even
E．Mentions
F．Merits
G．Prior
H．Probably
I．Remarkable
J．Scored
K.Sharply
L．Subjects
M．Top
N．Unlikely
O．Weakness
第(1)题__________
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答案解析：