Grammar in Context Modal verbs for Speculation

 Grammar in Context

Modal verbs for Speculation about the Present( Crime theme)

Fill in the gaps with must,might/ may or can’t:

Last night,the museum was broken in.The police are investigating,so the thief 1)....still be inside the building.The security cameras are not working,so it 2)....be difficult to identify him.I saw a suspicious person near the museum earlier.He3)....be the one who stole the painting.

Some witnesses say they heard loud noises around midnight.That 4).... be when the crime happened.The alarm system didn’t go off,so the guard 5)....have been asleep.I found a set of muddy footprint outside.They 6)....belong to the thief.

The detective says the suspect left no fingerprints.He7)..... be very careful.A passerby said someone was running away quickly.That person 8)..... be the criminal.Finally,the missing painting was last seen in the main main hall.It 9).....be hidden somewhere in the museum now.