''I drink and eat." is the general statement.
"I am drinking and eating," is what is happening at the moment you are speaking. They are both grammatically correct and none of our sentences "sound like a caveman."
Both are accepted for this translation which means that if your translation wasn't accepted you had something else wrong>
We moderators cannot see your sentence therefore before you make a comment you should have made a REPORT. TIPS TO MAKE LEARNING EASIER and EFFECTIVE + HOW TO REPORT A PROBLEM
they will help you:
1 always find the correct translation (Drop Down Hints)
2 find explanations for grammar and vocabulary....(Tips & notes)
3 Show you what to do if your sentence is rejected or you have another problem.
Also, check out the Greek Forum with many more resources…... https://forum.duolingo.com/topic/936