I think "Is it 6 o'clock" is enough.
Yep, totally. Even "Is it six?" was on the list, but this was somehow overlooked O_o Thanks, now it's accepted!
I said,” It is now six o clock” and it marked it wrong - please fix
Hmm, we only accept "o'clock". I've never seen it being written "o clock" (maybe people do when they text to save time).
I've never seen "o clock" in a text. When we write we use 6am, 6pm, 6, 18:00, etc
I wrote: Is it now 6 o' clock? I was marked wrong. They don't seem to like this word order but it can work in English.