John didn't come to school last week. (Must / sick)
He must have been sick.
A woman answers the phone. She starts yelling. Why?
varied answers
Why is Isabel late for class? (might / oversleep)
She might have overslept.
I can't find my notebook! (must, leave at home)
You must have left it at home.
Look at her diamond ring!
varied answers
One of the students failed the exam.
varied answers
You had a job interview. They haven't called you.
varied answers
You saw an old friend. She had lost a lot of weight.
varied answers
I can't find my ticket. (must / drop)
You must have dropped it.
Ryan handed in his exam. (can't / finish already)
He can't have finished already!
Why is Carl looking so happy? (may, do well on the test)
He may have done well on the test.