– James didn’t ____ last night, did he?– No. He ____. We had changed our plan.

 Martin hasn't got in touch with me for ages. He ________ my new cell phone number.

My friends __________ come to see me. I don’t want to go out in case they come.

It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words.                                                  

– Who didn’t turn off the light after school yesterday?– It ______ be Lucy. She told me she was the last one to leave the classroom.