— I didn’t do well in the exam. What about you?— I did _____ you. Maybe even worse.

The scientist corresponds with colleagues in order to learn about matters ________ to her own research.

Sometimes they may play to passers-by in the street or subway so that they can earn some______ money for themselves or to pay for their instruments.

David felt ________of the foolish thing he had done in the classroom.

–You’ve got a stomachache? But we ate at the same place. How come my stomach is fine? --You have an iron stomach! Mine isn’t ___ strong.