Listening to loud music at rock concerts caused hearing loss in some teenagers.
— Do you know where David is ? I couldn’t find him anywhere. — Well. He ______ have gone far –his coat’s still here.
This cake is very sweet. You _____ a lot of sugar in it.
He paid for a seat, when he ______ have entered free.
— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear ! She ______ a lot of difficulties !
Helen ______ go on the trip with us, but she isn’t quite sure yet.