--____ Tom and his brother get up so late ---- Sorry,I forgot to call them two.A.Can B.MayC.\Must D.Will 为什么选C

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$--____ Tom and his brother get up so late ---- Sorry,I forgot to call them two.A.Can B.MayC.\Must D.Will 为什么选C$

--____ Tom and his brother get up so late ---- Sorry,I forgot to call them two.A.Can B.MayC.\Must D.Will 为什么选C
--____ Tom and his brother get up so late ---- Sorry,I forgot to call them two.A.Can B.May
C.\Must D.Will 为什么选C

--____ Tom and his brother get up so late ---- Sorry,I forgot to call them two.A.Can B.MayC.\Must D.Will 为什么选C
这里must表示偏偏,有不巧,固执的意思,通常都指令人不愉快的事.
如:Must you make so much noise?你就非得弄出这么大的声音吗?
你这里是说:Tom和他哥哥非得起那么晚吗?(在责怪的意思在里面)

说明这两个家伙因为我忘记叫了，现在还在睡觉。