1 . This weekend witnessed our active participation in garbage ________ (collect) volunteer activity in the Hongxing Community. (所给词的适当形式填空)

2 . The __________ (collect) is housed in a fine building and is guarded by soldiers. (所给词适当形式填空)

3 . He had an immense ________ (collect) of second-hand cartons. (所给词的适当形式填空)

4 . Our ______ (collect) is big and our main task is to help you solve problems on making use of the library. (所给词的适当形式填空)

5 . He donated his entire ________ (collection) to the museum. (所给词的适当形式填空)

6 . The old ______ likes to collect some old paintings and his house is said to build up a fine art ______. (collect) (所给词的适当形式填空)

7 . My friend Lily showed me a large ________(collect) of CDs that evening. (所给词的适当形式填空)

8 . The Art Gallery of Ontario has the world’s largest ________ (collect) of sculptures by Henry Moore. (所给词的适当形式填空)

9 . There was a ________ (collect) of books and shoes on the floor. （所给词的适当形式填空）

10 . The first stage in research is data __________ (collect). (所给词的适当形式填空)