If the drought________in Southwest China, the crops will be ruined. Worse still, both people and animals will be threatened with a lack of drinking water.
It is impossible for ______ little children to do ______ much work in ______ a short time.
This new-type machine____________ little room.
--You don't look so well, Mary. What's the matter with you? --Why?___________.
China has hundreds of islands, ___________ is Taiwan Island.
You must have waited here for a long time ,___________you?