三. 用所给单词的适当形式填空。【语法专练】 1.Scientists (send)spaceships to Mars so far. 2.Julie ’ s father (go)to London last month.He ( be)there three times. 3.No one (be)to Mars yet, because Mars is very far away, much farther than the moon. 4.Astronauts already (fly)to the moon many times. 5.I (not read)the latest news about the space yet. 6.I already (see)the film. I (see)it last week. 7. — he (finish)his work today? — Not yet. 8.My father just (come)back from work.He is tired now. 9. — Where ’ s Li Ming? — He (go)to the teachers ’ office. 10. you (find)your science book yet?