I’m writing to invite you to the community lecture     1     (concern) garbage classification. Given that most neighbors fail to classify garbage properly     2     they really try to, our community     3     (organize) this lecture in an attempt to guide this deed. Garbage classification is     4     great significance. First, not only can it cope with pollution issue     5     (effective) but more space originally     6     (occupy) by wasteland will be spared. Second, we can undeniably make     7     difference by taking advantage of recyclable garbage. To fulfill your     8     (responsible) to live an eco-life, come and join in the lecture that is expected     9     (give) at 3 p.m. next Sunday on the playground. Only with combined efforts can we make     10     (we) neighborhood better.