【王叔叔英语短文阅读题UncleWangworksinabookshopinthemiddleofthecity.Theshopisnotfarfromhishome.Itisaboutonekilometreaway.SoUncleWangseldom(很少)goestoworkbybus.Heusuallygoestherebybike,sometimes】

　　王叔叔英语短文阅读题

　　UncleWangworksinabookshopinthemiddleofthecity.Theshopisnotfarfromhishome.Itisaboutonekilometreaway.SoUncleWangseldom(很少)goestoworkbybus.Heusuallygoestherebybike,sometimesonfoot.Ittakes(花费)himtwentyminutestogettherebybikeandfortyminutesonfoot.Todayhisbikeisbroken.Hewantstowalkthere.Nowheishavingbreakfast.Heleaveshomeattenminutestoeightandhewalkstoworktwentyminutesearlier.Hisworkstartsathalfpasteightinthemorningandfinishesataquartertofiveintheafternoon.

　　4.Whattimedoesheusuallyleavehomebybike?

　　A.Attenminutestoeight

　　B.Athalfpasteight

　　C.Attenminutespasteight

　　D.Attwentyminutespasteight

　　5.Heusuallygetsbackhomefromworkat()intheafternoon.

　　A.4:45B.5:15C.4:55D.5:05

　　答案是CD

　　为什么请解释