I know. When I listened to it on Fast speed she swallows the "en." I would like to keep listening to the Fast mode, but I'm finding tt I am marked wrong for missing words. I guess the solution is to listen to the Slow mode or listen to both. It is aggravating to have to keep hitting replay.
I understand your confusion: you put something you're sure you are right about but duo says NO. It can be hard. But adding "and another is not grammatical and wasn't in the sentence, not even implied. In other words, it makes no sense, even when you say your complete suggestion in English.