--- It was not until she had arrived home _________ her appointment with the doctor.
Studying in groups is necessary_____ you want to do well in school.
You can hardly imagine the ______ they went ______.
---He didn’t go to the concert yesterday, did he? ---_______, he was studying for the tests all day.
I have been to Shanghai. I______ there last month.
---Hello, can I speak to Robert, please? ---Hold on, please. He_______ in the garage.