都可以，只是前者为单数，后者为复数而已。例句：What subject are you good at?你擅长哪门功课？What subjects do they study at school.他们在学校里学习哪些科目？
what subject例句
What subject are you planning to major in?
你打算学什么专业？
What subject are you major in? Why you choose it?
你毕业后打算干嘛？你喜欢阅读吗？
In what subject did you get the highest marks?
哪一门课你得分最高？
what subjects例句
What subjects are you studying at the college?
你在大学读什么科目？
What subjects are you taking in the sixth form?
你在六年级选修什么课？
What subjects do you most enjoy reading about?
你最喜欢以阅读什么领域的文章。