[单选]  PoliceInvestigatingChildLuringCaseSankpolicewereinvestigatingapossiblechildluringcasenearaprimaryschool.IthappenedonTuesdayafternoon,duringthelunchhour.Mary,astudentofJohnLakeSchoolwasapproachedbytwomeninablackvan.Sherefusedandranaway.Whenshearrivedatschool,shereportedittotheschoolstaff.Theschoolsandthepolicetookitseriously.Theschoolswrotealettertoparentsimmediately,informingthemofthecaseandmakingsafetysuggestions.Policearelookingintothematter.Policerespondedtothecaseassoonastheyreceivedthereport.“It'samatterofpublicsafety,“saidthepolicespokesperson.“Wewanttomakesureeverybody,includingkids,adultsandpeopleoutandaboutaresafe. So,wetakethisveryseriously.“Policeweremakingsomesafetysuggestionsforthestudents.Policeaskedstudentstoalwaysbeontheirguardwhenwalkingtoschool. Kidswereencouragedtowalkinpairsandwalkinthedaylightwhereit'swelllit.Oneofthepoliceofficersaid,“…Studentsshouldtrytowalkwheretherearepeoplearound,andalwaysletsomebody,yourfamilyorfriends,knowwhereyouaregoing.“操作提示：通过题干后的下拉框选择题目的正确答案。1.Thetwomenintheblackvan. A.knewMary    B.wastheschoolstaff  C.probablywantedtolureMary 2.Maryisprobablya schoolstudent. A.kindergarten(幼儿园)   B.primary      C.middle   3. toothecaseseriously. A.Theschools   B.Thepolice    C.Bothoftheabove 4.Inordertobesafewhengoingtoschool,kidsshould  A.gotoschoolontheirown  B.takeself-defensesprayers(自卫喷雾器)   C.nottellanyonewherethey’regoing 5.Thiscaseindicatedthat shouldpayattentiontothesafetyproblems. A.thepublic    B.theparents    C.onlyschoolkids