When did you _________ the Chinese Young Pioneers?

________of the chemical factories in their city _________pouring waste water into the river. It’s too dangerous.

Shanghai is the city ______ the 2010 world Expo is held. –So it is a city____ most of us want to vist this summer.

Many people hope to live in a place ________the weather is always warm. [ ]

The boys are going to have funthe pictures.