英语 用适当的形式填空1)the shy girl always keeps her mouth ＿ (shut)句型转

用适当的形式填空
1)the shy girl always keeps her mouth _shut_ (shut)
句型转换
1）be careful not to make a mistake.(完成反意疑问句）
be careful not to make a mistake,will you?
2）there are too many cars at this time every day.(改为同义句）
there are too many automobiles at this time every day.
3)he is always in time for class.(改为同义句）
he is never late for class.
4)he has to go to school library (to borrow books).(对括号内的部分提问）
Why must he have to go to the school library?
5)when did you start learning english?(改为现在完成时）
When have you started learning english?