Since I have read quite a few English books, I know ______words and phrases, of which the majority______ been found in our textbook.

We have brought in a good grain harvest for three years_________

We’ll never give up_______ on the project no matter how difficult it is.

We often talk in groups and share our ideas with _____.

His ability has never been in doubt—-the question is___________ or not he is prepared to work hard.