71. Your key is on the floor.(对划线部分提问)

                  your key?

72. You can call Mary. Her telephone number is 65324466.(变同义句)

You can          Mary         65324466.

73. Tom is a good student.(变一般疑问句)

                   a good student?

74. Those are orange chairs. (变为单数形式)

         is          orange chair.

75. Are these your video tapes?(作肯定回答)

Yes,                   .

76. Are these your keys?(变陈述句)

                      my keys.

77. That is a pencil sharpener. (变为复数形式)

         are pencil          .

78. The baseballs are on the desk. (变否定句)

The baseballs          on the desk.

句型转换。根据要求完成下列句子。一空一词。

1. Your key is on the floor.（对划线部分提问）

                  your key?

2. You can call Mary. Her telephone number is 65324466.（变同义句）

You can          Mary         65324466.

3. Tom is a good student.（变一般疑问句）

                   a good student?

4. Those are orange chairs. （变为单数形式）

         is          orange chair.

5. Are these your video tapes?（作肯定回答）

Yes,                   .

6. Are these your keys?（变陈述句）

                     my keys.

7. That is a pencil sharpener. （变为复数形式）

         are pencil          .

8. The baseballs are on the desk. （变否定句）

The baseballs          on the desk.