The river has become much ______ than before because of the waste water.A. dirty B. dirtier C. Dirtiest
There are few students in the park, _________?
—May I go out to play soccer ball? —I’m afraid not. You can’t play __ you have finished your homework.
I can’t ______ it in English because I can’t ______ English. Can I _______ you the story in Chinese?
—The rain came to a stop the night before. The fields are still full of water. —It _________ for nearly a week.
_______carefully you write, _______ mistakes you’ll make.