试题题干
Fill in each of the following blanks with a word or an expression.
A great number of adults learn a second language through 
instruction.
参考答案
试题解析
很多成年人通过正规教育来学习第二语言。
Fill in each of the following blanks with a word or an expression.
A great number of adults learn a second language through instruction.
很多成年人通过正规教育来学习第二语言。