<P>&nbsp; What subject do you like? 的回答是不是只能回答为 I like ...&nbsp; </P>
<P>&nbsp; 能不能是I like ...and....</P>
<P>&nbsp; 或 What subjects do you like?回答I like...and...&nbsp;</P>

What lessons do you have in the morning/on Monday/ on Monday morning? 根据实际情况肯定不止一节课，所以用复数问。而What subject do you like? 指不知道答语是单数还是复数时用。可以回答i like PE. 也可以回答I like PE and English. 如果知道对方喜欢很多课程 也可以问：What subjects do you like?

What lessons do you have in the morning/on Monday/ on Monday morning? 根据实际情况肯定不止一节课，所以用复数问。而What subject do you like? 指不知道答语是单数还是复数时用。可以回答i like PE. 也可以回答I like PE and English. 如果知道对方喜欢很多课程 也可以问：What subjects do you like?   二楼总结得很精辟