__________ volunteers will be needed for 2014 International Horticulture Exposition (国际园艺博览会) in Qingdao.— Let’s go and join them.

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.

Can you see the boys football on the playground? They are my classmates.

My boss insisted that I _______ the work before ten o’clock tonight.

My parents are unhappy today I think I shall think of ways to ______.