A)quit B) journalist C) transplant D) confusion E) concentrate F) realistic G) adequate H) optimism I) putting off J) distracted K) showing off L) painful M) pessimism N) worthless O) successful Everyone of us wants to have a perfect memory. Only if we remember our past clearly can we have a(n) (36)___ opinion of ourselves. But a perfect memory may not be as good as one might think. Take a Russian (37) ______ for example. He had an excellent memory but could not forget. Memories from the past (38) __________ him from what he was doing and made it difficult for him to (39)_____ on the work he did or even to hold a conversation with others. Finally he (40) _____ his job and made his living by (41)_______ his abilities for people. A perfect memory is not always a good thing to have. With a perfect memory, you will remember both the jewels of experience and the (42) ________ stones. This might lead to (43) ______ in your mind. With a perfect memory, you might also remember things that may be best forgotten, such as mistakes you’ve made or (44) _________ moments of your life. A certain amount of forgetting, however, helps you to build a close relationship with family and friends. It also helps to build up self-confidence and (45) ______ _. In a word, it is helpful to have a certain degree of forgetting.