69. Jack will leave Los Angeles at the end of this month. (保持原句意思)

Jack _________ leave Los Angeles_________ the end of this month.

68. We must do something to keep the environment clean. (改成被动语态)

　 Something must ______　 _______ to keep the environment clean.

67. Kate is never absent from school.　 (改为反意疑问句)

　 　Kate is never absent from school, ________　 _______?

66. We can see electricity when the thunder crashes. (对划线部分提问)

　 __________　 __________ you see when the thunder crashes?

65. My friend likes films about cowboys.(改为否定句)

My friend __________　 __________ films about cowboys.

64. ___________ the butter into the flour, please. (mixture)

63. There are many ___________ children in some African (非洲的) countries. (home)

62. We are looking for students who can sing ___________. (beautiful)

61. Don’t forget to ___________ your email addresses at the end of the party. (change)