根据下列句子的意思及所给的汉语提示，写出空缺处单词、固定短语或固定搭配的正确形式。

1．I'll show my collection of         （邮票）to the class．

2．We practised         （唱）English songs for one and a half hours today．

3．Which country is         （大）in population，the U.S. or Canada?

4．Xu Li，with his friends，         （拾起）waste paper in the park every Sunday．

5．Do you know this table         （由……制成）bamboo?