Teenage is an especially important stage for us, ______we are supposed to go all out to improve ourselves because anything can happen.
He _______ have completed his work;otherwise, he wouldn’t be enjoying himself by the seaside.
It’s time that you __________ the whole book.
The of the book makes it suitable for children.The man is considering the question as .
—Have you read today’s report about your performance?—I don’t care what about me.
In the cave they found the very book, the cover of _______was torn.