In each pair, click on the version that does not have any shifts.
Click Submit after each question to see feedback and to record your answer. After you have finished every question, your answers will be submitted to your instructor’s gradebook. You may review your answers by returning to the exercise at any time. (An exercise reports to the gradebook only if your instructor has assigned it.)
Example
1 of 10
2 of 10
3 of 10
4 of 10
5 of 10
6 of 10
7 of 10
8 of 10
9 of 10
10 of 10