题目内容
The students were participating_______ an international energy saving competition between towns in New England and Canada.
A. for B. in C. to D. at
B
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天天向上一本好卷系列答案小学生10分钟应用题系列答案题目内容
The students were participating_______ an international energy saving competition between towns in New England and Canada.
A. for B. in C. to D. at
B
天天向上一本好卷系列答案小学生10分钟应用题系列答案