Ⅰ.改写句子，使用省略手段避免重复与冗赘
1．John worked hard but his brother did not work hard.
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答案：John worked hard but his brother did not.
2．I have lazy students and hardworking students in my class.
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答案：I have lazy and hardworking students in my class.
3．—Has he ever been abroad?
—No，he has never been abroad.
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答案：—Has he ever been abroad?
—No，never.
4．If it is necessary，we will finish it ahead of time.
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答案：If necessary，we w ill finish it ahead of time.
5．You must not be late and you must not be absent.
