Education & learning (CAE vocabulary revision)

I decided to brush ____ on my vocabulary by reviewing my notes before the English test.

I had to mull ______ the tricky math problem for a few minutes before I found the answer.

While working on the science project, I hit _______ a clever idea to make our experiment more fun.

It was a lot to take ________ during history class, so I asked the teacher to explain some parts again.

Before the t, Iest spent time swotting ______ on all the important facts from my textbooks.

Even after the detailed lesson, I was still in the _____ about the true meaning of the concept we discussed.

Although the teacher repeated the instructions, I was a bit slow on the _____ that day and needed extra help with the math problem.

The name of a famous scientist rang a ______, but I couldn't remember any specific details about him.

At the end of the project, our class took ______ of our work to see how much we had learned during the term.

His suggestion to cancel gym class because the school gym was being renovated didn't have a _____ to stand on when the coach explained that we could exercise outside.