【2015·天津】Jane can’t attend the meeting at 3 o’clock this afternoon because she ______ a class at that time.
After five years of preparation, Shanghai is presenting the world _______ many say is the greatest Special Olympics.
---He suggests the number of cars should be limited to stop air pollution. --- __________, the idea is not very practical.
.Scientists are trying to develop a special material, _______ they will make use of in space.
The education of _______young is always _______ hot and serious topic in modern society.
_________the authorities continue to crack down football betting _________a new hope in the future.