0
votes
1answer
325 views

Why did author use a different sort of articles in sentence, which describe a picture? [closed]

I am not a native speaker. I am doing a exercise "Answer the questions about the pictures" from my Grammar Book and I checked Keys at end of the book: I saw: In A the man is lying on the ...
6
votes
3answers
1k views

Is it correct to write “a 5-mm-thick layer”?

Do I need hyphens? Should I use the indefinite article or zero article?