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 practiced ______ (唱) English songs for one and a half hours today. 3. Which country is ______ (大) in population, the US 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?