She showed the visitors around the museum,the construction ________ had taken more than three years.(2011·江西)
We’d better hold more such activities, ______ students can combine study with fun.
How did all these _________?
While ____the dog, you should take care not to ____.Otherwise, it may be dangerous to strangers.
ItissaidthattherearemillionsofcamelsinIndiaand __ofthemisgrowing.
It’s exactly ______ we do ______ has changed the world.