— Could you give _______ an introduction to the new machine?— Of course. I will tell you how to use it. 

Be sure to read the ________ on the bottle carefully and take the right amount of medicine.

About ____ gene-targeting drugs are already in testing pipeline. It won’t be long ____ they are put into effect.

He felt very sad that though he worked very___indeed,he was not able to jump____.

------I didn't mean ______ my mother.------But talking to her like that meant ______ her.