quEstions 18 to 20 ArE BAsED on thE Following pAssAgE.At thE EnD oF thE pAssAgE, you will BE givEn 15 sEConDs to AnswEr thE quEstions.
ACCorDing to thE pAssAgE, how mAny milEs is thE EArth’s DiAmEtEr
A、2,000. B、4,000.
C、8,000.
D、16,000.