题目内容
The only way to improve is through hard work and dogged _______.
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Some of the dialogues have been changed to make them more ______ to an American audience.
During our discussion, our psychology tutor ______ that family values were changing very fast.
An unhappy family environment can sometimes ______ a child from doing well at school.
In games like tennis, it’s important to ______ even when feeling really tired.
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