It should fixed by now. I have left out the article in other lessons and my answers were correct. Along with answers, an "alternative solution" is given which contains the article.
Exactly In arabic It's "morning good" صباحُ الخير And not "good morning" جيد/خير صباح You'll get used to it my friend.
Yes, its not a correct word to use for it. Instead, mumtaaz (better/excellent) is a good choice for it.
Actually , you should get the translation in any language you're studying.
I wonder why it's not working for you. The only case I know where I don't get the translation from putting the pointer on the word is when I'm doing the tests.
Have you tried putting the cursor on the word rather than under it ?