To my surprise,the old man _masters___ five foreign languages.
2.Our parents all _expect___ we can become helpful people to the society in the future.
3.The _introduction___ of the new learning method is very helpful.We can learn a lot from it.   说明为什么填这个答案  这题有什么知识点  易错点  谢谢
每个单词意思是1.掌握 2.期盼 3.介绍