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问题: 高一英语选择题,请教选与不选的原因,谢谢!

________ they visited the Science Museum, they showed great interest in everything they saw.
A. The frist time B.For the first time C.At frist D.At the frist time

解答:

A
The frist time 可以引导状语从句,
其他的不可以引导从句
For the first time 第一次
At frist 首先
At the frist time (没有这个短语)