---Wow, so many books here! How can you find the one you need?---That’s easy. The books are according to subject.
—Have you thought of the topic for the composition? — Not yet.I _____ it very carefully, but I haven’t decided.
The most important thing about cotton in history is _____ part that it played in ____ Industrial Revolution.
._____ and happy, Tom stood up and accepted the prize.
.People have planted a lot of trees and grass in order to ____ wind and sand in the desert.
Read the passage and correct the mistakes, ______.