问题 选择题 计算，选择得数。( ) 1. What's seventeen plus fourteen?( ) 2. What's nine plus twelve?( ) 3. What's thirteen plus thirty-six?( ) 4. What's forty-one plus fourteen?( ) 5. What's twenty-five plus fifteen?A. Forty-nine.B. Fifty-five. C. Thirty-one. D. Forty. E. Twenty-one. 答案 1. C 2. E 3. A 4. B 5. D
