The little boy _____on the mat ____ to his parents that blackbirds had _____their eggs on Mars．

---Does your brother serve in the army?---No, not now. But he ________ in the army for 8 years.

When I talked with my grandma on the phone, she sounded weak, but by the time we ___ up, her voice had been full of life

Much to our joy, John was finally __________ to join in our adventurous journey. 

-- Have you each got a computer in your office?-- Of course.        of our work           by the computer.