I think that ____ very difficult to learn.

Why don’t you ask him for help? You _____ be good friends.— We have disagreements and we haven’t talked to each other for a long time.

We had a bad weekend. It ________ all the time.

Where’s David?—He ______ be in the playground because he is fond of playing basketball.

Have you read _____book called “Harry Potter”? –Yeah, and I want to read it _______second time.