1. |
A: |
What are the problems on earth? |
|
B: |
How can we help to save our earth? |
2. |
A: |
What games did the children play in the past? |
|
B: |
What games do we play nowadays? |
3. |
A: |
What outdoor activities do you like doing? |
|
B: |
Why do we have to do some outdoor activities in our free time? |