1 . This teaching method ______________(出现) in the late 1970s. (根据汉语提示单词拼写)

2 . With the information explosion in science and technology, more and more new concepts will e______ and need to be defined.(根据首字母单词拼写)

3 . When the moon ________ (出现) from behind the clouds, I made out a figure moving in the distance.(根据汉语提示单词拼写)

4 . Many facts e_________ (显现) as a result of the investigation. (根据中英文提示单词拼写)

5 . At that time a wonderful idea e________（出现）in my mind. (根据中英文提示填空）