--Wow, so many new houses! I can’t believe that. It used to be a poor village.

--- Yes,_________ has changed here.

A．Nothing

B．something

C．Everything

D．Anything

报纸不能用来包装食品，除因可能带有病菌外，还因报纸上带有（）元素。

A.钠

B.锡

C.铅

D.铝