This kind of exercise is most _______, and therefore is a good test of your students’ ability.

This kind of exercise is most _______, and therefore is a good test of your students’ ability.

1. A.
   surprising
2. B.
   encouraging
3. C.
   exciting
4. D.
   challenging

This kind of exercise is most _______, and therefore is a good test of your students’ ability.

A. surprising            B. encouraging    C. exciting       D. challenging

This kind of exercise is most _______, and therefore is a good test of your students’ ability.