I don’t know the reason _______ you were absent from the meeting, and I am not sure that someone will tell me the reason _______ you haven’t told me.
_____ it is _____ you obtain, you should share _____ your parents your feelings.
A greenhouse is a building _______ of glass _______ for keeping plants warm when the outside temperature is low..
She is the only one of the persons ________ from the mistakes.
About _______ gene-targeting drugs are already in testing pipeline. It won’t be long ______ they are put into effect.
---_________________ ---Thank you. I certainly will.