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hasn't flown didn't fly hadn't flown wasn't flying
So far, rockets with men have been to Other places. Rockets with men can fly to other places farther away than the moon. Perhaps one day rockets will be able to go to any place in space. A plane can fly to the moon.
across; through through; across across; across through; through
the students to fly the plane all the time all students to fly the plane the students who were not frightened to fly on their own some students to fly a little while
the moon is 240 kilometer far away we don't know where it is it can't fly without air there is no air on the moon
hasn't fiown didn’t fly hadn’t flown wasn’t flying
skill technology knowledge ability
the moon is 240 kilometer far away we don't know where it is it can't fly without air there is no air on the moon
the moon is 240 kilometer far away we don't know where it is it can't fly without air there is no air on the moon
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