Those old pictures of people flying in the air ____ be real. Someone has definitely altered them.
can't
must
might
The photographer ____ very happy with that image. It looks amazing!
could
must
can't
"Is your brother in that picture?" "I don't know, but I think that ____ be him in the background."
might
must
can't
I'm not 100% sure who is in the video. There's a chance that it ____ be that famous movie star.
must
can't
could
Those pictures are terrible. They ____ be by a professional photographer.
must
can't
could
It's possible that this famous photograph ____ be retouched.
must
can't
might