С.
complete the mini-dialogues with these words: could not, may, might not, must, must not. won't. note that two are not used.
1) a: these figures could be wrong.
b: yes, that's possible.
2) a: these figures can't be right.
b: yes, i agree. wrong.
3) a: these figures may not be right.
b: yes, i agree.
a: these figures shouldn't be any problem.
b: yes, i agree. there .