问题 选择题 选择正确的答案。( ) 1. one + six = __________( ) 2. seven －six = __________( ) 3. two + four = __________( ) 4. nine －seven = __________( ) 5. ten －six = __________( ) 6. two + three = __________A. fourB. fiveC. twoD. sevenE. oneF. six 答案 1. D 2. E 3. F 4. C 5. A 6. B
