It was a problem then, but now I just laugh ...... it.
at
I post photos one for half year.
I post photos once for half a year.
I have nothing against about it.
I have nothing against it.
He is good ...... maths.
at
She graduated .............. Harvard this year.
from
Don't forget to lock the door .................. (za) you.
behind
I don't like publish a lot of photos.
I don't like publishing a lot of photos.