根据句意和提示的字母,补全句子.
问题描述：
根据句意和提示的字母,补全句子.
1.There m____ by four is twelve.
12.Fifteen d______ by three is five.
3.June 1 is I_______Children's Day.
4.In a ___________ times,people had no houses and they had to live in the forests.
5.You can send e______mails to me during my absence.
答
1. multiply
2. divide
3. International
4. ancient
5. electric