Choose the right form. 1. There has been a snowstorm in the mountains. The roads couldn't/might not be
passable.
2. We should call Tim before going to his house; he couldn't/might not be there.
3. Unfortunately, James and Michelle have already made plans, so they couldn't/might
not come with us to the exhibition at the Museum of Contemporary Art.
4. Eve wants to go to the ballet, but she couldn't/might not be able to get time off that
evening
5. The video is gone. Doug must take/must not have taken/must have taken it.
6. Susan couldn't/might not hear the speaker because the crowd was cheering so
loudly.
7. Jerry couldn't/might not be angry at me. I've never done anything to upset him
​