有几题英语题请帮忙解答,并讲解一下,谢谢!1.It'sseveno'clockintheevening.Danielwithhisparents_______TV.a.watchb.watchsc.iswatchingd.arewatching2.Whendidyourfather______youemother?a.marryb.marryto

　　有几题英语题请帮忙解答,并讲解一下,谢谢!

　　1.It'sseveno'clockintheevening.Danielwithhisparents_______TV.

　　a.watchb.watchsc.iswatchingd.arewatching

　　2.Whendidyourfather______youemother?

　　a.marryb.marrytoc.marrywithd.getmarried

　　3.There______greatchangesinourcountryduringthepasttwentyyears.

　　a.havebeenb.hasbeenc.hashadd.havehad

　　4.MaryisflyingtoFrancesoon.Shewillarrive______Paris______themorningofJuly9.(此题关于地名和时间怎样用介词,能说一说吗?

　　a.at;inb.in;onc.in;ind.at;on

　　第四题谢谢,讲的非常清楚.第一题为什么是iswatching，而不是arewatching,能再说一下吗？