Which of the subjects do you like best,Eddie?
问题描述：
Which of the subjects do you like best,Eddie?
Which subjects do you like best,Eddie?中的subject要不要加s
答
如果在of 短语中肯定要加!
注意：
of 在这里是表范围的“在.之中”
Which of the subjects do you like best?
但：
Which subject（单数） do you like best.