Oneday,Jack’sparentstoldhimthathisgrandpawouldretire(退休...
问题详情：Oneday,Jack’sparentstoldhimthathisgrandpawouldretire(退休)afterworkingforfortyyears.Jacksaidinsurprise,“I’monlyseven,soitmeansGrandpahasbeen…er…Areallylongtime!”Hisparentssaid,“Yes.That...