For each blank in the following passage, there are four choices marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.
Insomnia, or "poor sleep", can have bad effects on a person's health and general well-being. It can 21 on both our physical and mental health and can lead to other health 22 .
Insomnia can be traced to many different reasons, but what is 23 to many sufferers is their inability to relax fully and "switch the mind 24 ".
Constant thoughts, 25 around and around in the mind, moving from one 26 to the next, prevent stillness and peace and 27 a sufferer extremely tired.
In order to treat insomnia 28 , it is first necessary to allow a sufferer to re-experience 29 real relaxation feels like. It's almost as though they've forgotten how to relax. Once this has been 30 by the brain, then fast and effective 31 can be made to re-educate the unconscious towards allowing the person to relax 32 and to allow a natural state of sleep to 33 .
Hypnotherapy（催眠疗法）is one of the fastest and most effective ways of 34 this goal for long-lasting results.
Sleeping pills, if used at all, should only be a short-term 35 as their effect is soon reduced and their side effects can be deep and far-reaching.
____.
此处表示“它能影响我们的身体和心理健康”。harm伤害；affect影响，为及物动词，后面可直接跟名词；change改变；impact影响，作不及物动词时，可以加介词on再跟名词。故选D。
