When we combine a word with not, we always drop the o, and put an apostrophe between the n and the t. We also combine the words into one word, with no spaces.

In this case, the correct answer is isn't**.**

To answer this question correctly, we have to think about what we do with a soccer ball. When we play soccer, we kick the ball, and to score we have to kick the ball into the net. This correct answer to fill in the blank is "kicked".

Alison kicked the soccer ball into the goal.