We learned to use "懂" in a previous lesson, so allowing "不懂" here would seem to make sense.
Yes, but that is more colloquial.
懂 means "know" while 明白 means "understand".
I tried to be fancy and use 了解 instead of 明白 and it rejected my answer. Any particular reason why I was wrong? Or should I report it?
I had the same thought -- and was also marked wrong. I reported it, but I could be wrong.
Although I may not be correct, but I think that answer should be accepted.
why can't i write 我不了解这个句子？
What is the different between “懂” and ”了解“ and "明白“ ?
Is 个 really the best measure word to use for 句子?
I think so.
Yes, it is.