The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
. The celebration started at ten in the morning and____about two hours.
. Yesterday I missed my feet on the stairs and had a bad fall. Luckily it was nothing serious ___.
. _____ at the news that I didn’t know what to say to comfort her.
. — He speaks French because he once lived in France. —Really? How long _____ there?
. — We had a good time in the park last Saterday. Pity you weren’t there. — I really ____ come but I was looking after my mother in the hospital.