He's read this book before, ______?A. hasn't he B. doesn't he C. isn't he
—Han Li has improved her English a lot since she joined the English Club.—How ______ she chose to join it at first!
The math teacher got angry with me when I did not ______ him in class yesterday.
Our English teacher speaks very loudly ______ all the students can hear him clearly.
I don't know ______ next time.
If you want to know how a word is used,you can ______ it ______ in a dictionary.