Our summer holiday often___50 days.It's much longer than the winter holiday.A,last B,lasts C,last for D,lasts for.该选哪个?并说明理由,

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Oursummerholidayoften___50days.It''smuchlongerthanthewinterholiday.A,lastB,lastsC,lastforD,lastsfor.该

Our summer holiday often___50 days.It's much longer than the winter holiday.A,last B,lasts C,last for D,lasts for.该选哪个?并说明理由,
Our summer holiday often___50 days.It's much longer than the winter holiday.
A,last B,lasts C,last for D,lasts for.该选哪个?并说明理由,

Our summer holiday often___50 days.It's much longer than the winter holiday.A,last B,lasts C,last for D,lasts for.该选哪个?并说明理由,
D.lasts for
last for + 一段时间,这是固定用法,表示持续一段时间.
one summer holiday,所以后面用单数,lasts for.

若单数则选B

B summer holiday 是单数形式 last 后面不用加for

根据语法能选B和D,再用排除法,只能D。
last for + 一段时间,这是固定用法,表示持续一段时间。
one summer holiday,所以后面用单数,lasts for。