A:∀n∈N*,f(n)∉N* 且 f(n)>n
B:∀n∈N*,f(n)∉N* 或 f(n)>n
C:∃n0∈N*,f(n0)∉N* 且 f(n0)>n0
D:∃n0∈N*,f(n0)∈N* 或 f(n0)>n0
——What do you think of Tom?——He is ________ honest boy. He can play ________ piano very well.