______, the library was closed.
It is five years since my dear aunt ________ here.
It _______ nearly two weeks ________ I had received his letter.
----This returned Chinese scholar has become one of the top experts in this field. ----Yes,I know him very well.He_________in Africa with animals for eight years.
----Does Liu Hua serve in the army? ----No,but he__________in the army for three years.
The boss praised the young man for his hard work, though he ____ experience.