参考答案如下：
1. We find it's easy to pass the exam.
( 做法：在it后加上is，it就由形式宾语变成宾语从句的主语了。 )
2. I think it necessary to exercise every day.
( 做法：与上一题相反，把is去掉，it就变为了形式宾语。 )
助你愉快学习！
It is easy for us to get pass the exam.
It ‘s necessary to precise the thing every day.
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