https://online2.tingclass.net/lesson/shi0529/0008/8765/81.mp3
https://image.tingclass.net/statics/js/2012
[00:01.84]3 Listen and complete.
[00:06.70]What have the children done for their project
[00:10.30]on population?
[00:11.96]Listen and complete their sentences.
[00:16.14]…………
[01:04.64]4 Listen and complete.
[01:08.78]Listen and fill in the missing information
[01:12.33]in the table.
[01:14.21]…………