用are,因为表语Chinese,English and French决定了主语从句What I want to learn 为一个复数概念,所以谓语为复数.
再如:
What I need is (单数)more time.
比较:
What I need are (复数)two books.
用are,因为表语Chinese,English and French决定了主语从句What I want to learn 为一个复数概念,所以谓语为复数.
再如:
What I need is (单数)more time.
比较:
What I need are (复数)two books.