下列句子没有语病的一句是（ ）

Many people are not fully aware of the damage that it does to their health. This is ____ we chose this picture as our logo.

最近发展区理论的提出者是（）

下列句子中，加点的词语使用不正确的一项是（ ）

Technology has quickened the rate _________ we communicate with the world around us.