Grammar pedants to check this please.....

[gameboy]

DS1 has been set some preposition homework which includes filling in blank with a preposition.

The sentence is:

I was sat --- the teacher.

Now, surely this should be either
a) I sat _ the teacher, or
b) I was sitting _ the teacher.

?

Or am I old fashioned and does this pass ofr OK these days?

ooh, is the missing word "correcting"?

you are right, btw