I can’t help you ____ much for your help．

I'll be home late, but please don't stay ____ for me.

—Can you describe a distinctive characteristic of this animal?—Its neck can be extended ________ of its body.

Although modem organic food has become very popular, many people can' t figure out the difference between organic foods and ______ grown foods．

(2013·沈阳二中模拟)She devoted herself________to her research and it earned her a good reputation in her field.