When he was there, he ____ go to that coffee shop at he street corner after work every day.
—Will you go to the park now? —Not until I ________ my physics exercises.
Unfortunately, when I dropped in, Professor Smith ________, so we only had time for a few words.
—Does Liu Hui serve in the army? —No, but he ________ in the army for three years.
I feel sure I ________ her somewhere before.
—Are you a teacher? —I ________, but now I am working in a company.