She ____________________ studied really hard. She passed all her exams with excellent grades.
must have
He _________________ arrived by now. It's only a 20 minute journey!
must have
The boss is in a terrible mood. The meeting _________________ been good.
can't have
Sarah __________________ been so happy when her boss told she was promoted!
must have
I had to wait 45 minutes for a bus yesterday. It _______________ happened an accident on the road.
might have / may have
He _______________ bought a new car. He told me he didn't have any money.
can't have
Andrew didn't study for the test, but he's passed. I think he ________________cheated.
might have / may have
I left my bicycle in front of the library, but it's disappeared. Someone ____________ stolen it.
must have
He ____________ tried to fix the computer himself. He doesn't like to ask for help.
might have
He _______________ known it was your birthday. Otherwise, he would have called you.
couldn't have
I'm sorry, but Samantha is not here. It's 5:00 p.m., so she _________________ already left the office.
must have
