Nowadays, most people,in order to keep fit,prefer walking to driving ____necessary.
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 .
.—Who did you stay with ? — .