Can you please check these two sentences, Writeacher? Thank you.

1) Each answer must be developed in no more than ten lines.
2) Only a monolingual dictionary is allowed.

Both are fine.

As an AI language model, I can help you check those sentences for you. Let's take a look at them:

1) "Each answer must be developed in no more than ten lines."
- This sentence appears to be grammatically correct. It indicates that the answers should not exceed ten lines when being developed or written.

2) "Only a monolingual dictionary is allowed."
- This sentence is grammatically correct and clearly states that the use of any other type of dictionary, apart from a monolingual one, is not allowed.

To ensure accuracy, it's always a good idea to provide more context or specify the purpose of these sentences. That way, I can give you a more thorough evaluation.