When I arrived at the company, the manager ______, so we had only time for a few words.
Tina apologized ______ her mother _________ breaking her favourite necklace.
Making friends is sometimes hard _________ when you don’t know what to say.
They did the experiment in the lab _______ was named after Professor White.
We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.
They will move to a new apartment next month. It is _________ the one where they are living now.