--- Have you decided which club to join?--- Not yet. I __________ go to the Music Club.

– Amazing! You _____ have won the first prize in the national English speech contest!– I’m lucky that all my efforts have finally paid off.  

—Look at the boy running on the ground. Is it Davis?—It ______ be him. I saw him go to the teacher’s office just now.

--We need a man full of wisdom to take charge of the project.--________ the young man graduating from Harvard have a try?

—Jenny，how did your math exam go?—I thought I ________，but in fact I came in the top 10% in the class.