how did you try to get school on time( )you missed the school busHow did you try to get to school on time ----you missed the school bus?A.whenB.ifC.once D.that 要注意,不是选A,请帮我分析选B理由、语法,望赐教!

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how did you try to get school on time( )you missed the school bus
How did you try to get to school on time ----you missed the school bus?
A.whenB.ifC.once D.that
要注意,不是选A,请帮我分析选B理由、语法,望赐教!

其实应该这样认为 一般面对陌生人 你不知道对方是否又迟到的毛病 你为了礼貌起见 一般以假设来寻求帮助 会更好 毕竟迟到是一件不好的事情 用假设语气最好.该题答案由语境决定的,其实客观的说用when 也可以,但是这样的选择题只能选一个最好的.希望这位同学可以明白