第四步：实践与提高

　　将下面的句子补充完整：
　　1. There is little doubt that serious attention must be called to the problem of …
　　2. It is necessary that effective action be taken to prevent the situation .
　　3. It is hoped that great efforts be taken to control the growth of…
　　4. It is hoped that great efforts will be directed towards finding …
　　5. It remains to be seen whether…, but the prospects are (not) very encouraging .
　　6. At any rate, wider attention should be given to the possible consequences of…
　　7. To reverse the trend is not a light task , and it requires a different state of mind towards …
　　8. For these reasons, I strongly recommend that…
　　9. For the reasons given above, I feel that…
　　10. Taking into account the reasons mentioned above, we can confidently come to a  conclusion that….

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