mEChAniCAl toy CArsA，B，AnDC，EACh trAvEling At its own uniForm rAtE，stArtED From thE sAmE point At thE sAmE timE AnD rACED A 400-mEtEr CoursE．
whEn
A、CrossED thE Finish linE．
B、wAs 40mEtErs BEhinDA，AnD
C、wAs 58 mEtErs BEhinD
A、
whEn
B、CrossED thE Finish linE，how mAny mEtErs wAs
C、From thE Finish linE
A、16
B、18
C、19
D、20
E、22