—Mum, I think I’m to get back to school.—Not really, my dear. You’d better at home for another day or two.
The world’s population is getting larger and larger, so scientists are trying to _______ new ways to solve the food problem.
Now more and more people ________ sending e-mails ________ letters.
He is ______ excited to hear the good news.
.Not all the students sitting in the back row can see the words on the blackboard _________.
---Our club has just finished an _______ documentary. ---Really? Can I have a quick look at it now?