Study hard, _______ you will fall behind the others. A. and B. but c. or D. though
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?