Grammar test: Fill up, in, and out

Fill ___ the entire circle. **in** up out "in" is used when there's blank or space to fill. Usually used in test directions like fill in the blank. Johan, fill ___ his water bottle. in **up** out "up" is used in bottle, cup or any container with a liquid. Filling the container up. Kindly fill ___ the form before leaving. in up **out** "out" is the correct preposition to use that is mistakenly replaced by "up" when it comes to this kind of sentence. Now, it is your turn to answer. Fill __ this form. Make sure that you fill __ all the blanks before you fill __ your tank.