The fire made _____ difficult to rescue the people trapped under the ruins in the earthquake.
The novel was so interesting that he read it _____ in a single day.
After the flood, no house in the village ______,
-----Hi, Nancy, I didn’t know you had come back. So have you graduated from college?---- Yes. I _____ French for 5 years in Nanjing.
---- Could I have a word with you?---- Sorry, I am busy ______. Shall we do it later?
---Why didn’t you go to yesterday’s meeting?---I would have but I ______ too busy working on the important experiment.