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?

B. Fifty-five.

C. Thirty-one.

D. Forty.

E. Twenty-one.