----Will you go shopping now?   
---- Not until I _______ my experiment.

------- Alice, why didn’t you come yesterday?
------- I _______,  but I had an unexpected visitor.

Her brother was _______ by the army because of his bad eyesight.

When she realized I       her, she quickly made a pose, smiling．

        yesterday，we went out for a wall

— Is it all right if I come at about 8.30 ?
— No, I  ________  the football match then.

--If you    to the party last Saturday, you would have met our old friend Jim .
--I caught a cold, for I had been walking around in the rain.

The Group of Eight (G8)______ the eight richest countries in the world.

Have you seen my dog? I _________ for it and still haven’t found it.

When I arrived at the station, I found the train _________ for passengers.