第 80 课: 复习第七部分-2

The bikers are moving fast. 这些骑自行车的人骑得很快

The bikers are moving slowly. 这些骑自行车的人骑得很慢

The airplane is moving fast. 这架飞机飞得很快

The airplane is moving slowly. 这架飞机飞在慢慢地移动

It is wintertime. Snow is on the trees. 现在是冬天，树上有雪

It is summer. The trees are green. 现在是夏天，树是绿色的

It is summertime. The people are in the swimming pool. 现在是夏天，这两个人在游泳池里

It is fall. The trees are yellow and the leaves are on the ground. 现在是秋天，树都黄了，地上全是树叶