1 . It is widely ________(公认) that language learning is easily influenced by mental factors. （根据汉语提示单词拼写）

2 . It's generally a________ that education shouldn't be measured only by examination results. （根据首字母单词拼写）

3 . My tutor told me I couldn’t write what other people had said without a_________(答谢) them. (根据中英文提示单词拼写)

4 . It is generally _____ (承认,确认) that a suitable method for learning is important.