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When he was a child, he was always ______ out new ideas.　

A. try
B. trying
C. taking
D. tried
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科目：初中英語 來源：專項題 題型：單選題

When he was a child, he was always ______ out new ideas.　

[     ]

A. try
B. trying
C. taking
D. tried

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科目：初中英語 來源：同步題 題型：單選題

When Edison was a child, he was always asking questions and ____ new ideas.
[     ]
A. trying out  
B. try out        
C. tried out      
D. trying

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