题目内容：

Now that you know English is useful,you should study hard._ you know English is useful,you_study
____ you know English is useful,you____study hard(同义句）

优质解答

Now that you know English is useful,you should study hard.
_ you know English is useful,you_study
____ you know English is useful,you____study hard(同义句）
Since you know English is useful,you ought to study hard