问题
                    
One learns a knowledge by making mistakes and ______ them.
                            A:corrects
B:correct
C:to correct
D:correcting
                        
                        B:correct
C:to correct
D:correcting
正确答案是:
                        
                        
                        
                    同类题型
                    Where would your parents like to live after they retire?– They’d like to live_________.
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Who’s the little baby in the photo, Susan? –It’s me. This photo ________ fifteten years ago.