wait    practise    give    serve    return

56．Mum will not let Simon go out next time unless he　　 home before dark．

57．﹣Who　　 us a talk on how to protect the environment next Monday？﹣Mr. Smith is．

58．We are sure that he will win the game because he　　 a lot for it．

59．─What's wrong with you，Jane？

─I'm a little sick and I　　 for Dad to take me to the hospital．

60．Tim is a manager now，but he once　　 as an engineer for five years．