—Are you still working in that company, Mary?—No, it is ten months ____ I worked there.
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.
When you go by train, please see to it_______ you take an express, _______ that stops only at big stations.