Easy
1 point
ID: #15183
Question
They - at least an hour ago : -
Options
1
might have arrived
Correct Answer
2
ought to arrive
Correct Answer
3
should arrive
Correct Answer
4
must have arrived
Correct Answer
Explanation
'Might have arrived' expresses a possibility about a past event. Given the time reference 'an hour ago', a perfect modal form is appropriate for speculation.