I've achieved a lot in my study, thanks to ____ who helped me.

The English spoken in the United States is only slightly different from ___ spoken in England.

Life in the city is quite different from _____ in the countyside.

We also had different students in some classes, so ______was a struggle to remember all the faces.

We are confident that the step the Chinese government has taken to cope with the current crisis is ______ of great significance.

- The story is so amazing! It’s the most interesting story I’ve ever read.
- But I’m afraid it won’t be liked by     

My son wants a pet rabbit for long, but I have no time to buy ______ for him.

—I’m sorry, but we have no more than one copy of 1942 for rent now.
—That’s OK. I’ll take _____.

Of the two brothers, Bill is ______ younger one, and he is a quiet boy, ______ that most adults like very much.

Tom thinks _____ important to get to know his students well.