问题
填空题
计算题
1.
Answer:
2. Bill is eighteen years old, and his age is three times that of Mary.
When Billis twice as old as Mary, how old is he then?
Answer:
答案
1. 8kg 2. 24 years old．
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计算题
1.
Answer:
2. Bill is eighteen years old, and his age is three times that of Mary.
When Billis twice as old as Mary, how old is he then?
Answer:
1. 8kg 2. 24 years old．