问题
选择题
________they visited the Science Museum, they showed great interest in everything they saw. [ ]
A. The first time
B. For the first time
C. At first
D. At the first time
答案
答案：A
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________they visited the Science Museum, they showed great interest in everything they saw. [ ]
A. The first time
B. For the first time
C. At first
D. At the first time
答案：A