——What do you think of the book? ——Oh, excellent. It is worth _________a second time.
That beautiful skirt is _____ cotton.
— Why _____ most stars _____ in the daytime? — Because the sun is too bright.
— Students _____ be allowed to use mobile phones at school. — I agree. Phones can bring troubles.
— Do you mean you will join the club? — Yes, I am _____ it.
— My bike is broken. What should I do? — You can get it _____ in that bike shop.