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?
1.stamps 2.singing 3.larger/bigger
4.picks up 5.is made of