Translation:My older brother has a fever.
I don't understand why "了" is used with being sick ("生病了") and having a cold ("感冒了"), but not having a fever ("發燒了").
I t's quite common to say "My older brother has fever." You don't always need the 'a' in English. Marks you wrong for writing that however.
Hopefully in a few years time you might read this and add it to the list of possible English answers.
I'm way past being polite now this constant problem is so irritating. Great program for learning Chinese, and I appreciate it is free, but what a shame you have such a paucity of English answers in this course. Once again, we are not here to learn English!!!!!!!!!!!!!!!!