They ___________ (be) in love since they met last Valentine's Day. They look so happy together. a) must have been b) should be c) may be
must have been
She ___________ (go) to the Valentine's party last night. She said she was feeling unwell.
can't have gone
He ___________ (buy) her flowers, but I'm not sure. He's very romantic. a) could have bought b) must buy c) should buy
could have bought