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By next year,he ( ) twenty years old.A will beB will have been 为什么B不行
题目详情
By next year,he ( ) twenty years old.
A will be
B will have been
为什么B不行
A will be
B will have been
为什么B不行
▼优质解答
答案和解析
他成为20岁时一个短暂的动作,不是延续性的.不能用have been
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