----- Will you do me a favor to have dinner with me at seven this evening?----- I’m afraid I can’t. I ______ a lecture at the meeting hall at the time.
Greatly moved by her words, __________.
The population of many Alaskan cities has ______ doubled in the past three years.
---In the past ten years, there have been many changes in family life. --- Are these changes ______?
His sister had become a teacher , ______ was what he wanted to be.
They ______ on the program for almost one week before I joined them, but still no good results _______ so far.