Using bicycles ______ greatly to people’s physical fitness as well as easing traffic jams.
________ I can see, there is only one way to solve this problem.
We all do more speaking , even when we have a break after class .
Zhang Hong is said by heart 2000 words up to now .
They really have a great time too , designing everything , drawing the blue prints , the angles and so on .
—Was it in 1969 the American astronaut succeeded landing on the moon ?—Yes , that’s right .