—Mum, would you buy some cherries for me? I love them. —I’d like to, but they are not ________ in winter.
Personally, the job as a teacher _____ be challenging, for I sometimes _____ deal with some smarter but less diligent students.
Nowadays, _______ cars are more and more popular.
I don’t know why he ________ in the middle of a sentence.
College graduates are offered lots of available jobs, ______, I believe, they can fully demonstrate their knowledge and competence.
Scientists also have no idea how long it will be before all wild animals in the cages _____.