A:一直上升
B:没有变化
C:先降后升
D:先升后降
观____ 捧____ 超____ 恳____ 测____
现____ 棒____ 起____ 垦____ 侧____
目前人口自然增长率为负值的大洲是( )
Yesterday I ________ football with my friends. ( )
There are small houses _______ the village.