73. If it isn’t rain tomorrow, I will go to the zoo with my parents.　　 ________

　　　　　　　　 A　　　　　　　　　 B　　　　　　 C　　　 D

72.He is enough old to go to school.　　 _______

　　　　　　　 A　　 B　　 C　　　 D　

71.(　　 ) We are now　 invite secondary school students to help.　　 ________

　　　　　　　　　 A　　 B　　　　　　 C　　　　　　 D

70. We have Maths every day because Maths is very important. (对划线部分提问)

　 _______ do you _______ Maths every day?

69. They want to know something about fish, too. (改为否定句)

　 They don’t want to know ______ about fish, _______.

68. Study hard, or you can’t pass the exam. (改为同义句)

　 _______ you _______ study hard, you can’t pass the exam.

67. It take baby pandas 14 hours a day to drink their mothers’ milk. (改为同义句)

　 Baby pandas _______ 14 hours a day _______ their mothers’ milk.

66.I have 5 colour pens, but Daniel has only 3.(改为同义句)

　 Daniel has ___________ colour pens ___________ I.

65.They spend a lot of time _______________ it every week. (练习)

64. It is __________________ to see birds and insects without waiting quietly. (不可能的).