1Have you ever been to the Zoo? 2When did you go there last? 3What animals did you see there?
1Are ecological problems becoming more and more important today? 2What is one of the most important ecological problems in the oceans? 3Are big cities polluted?
2When did you go there last?
3What animals did you see there?
1Are ecological problems becoming more and more important today?
2What is one of the most important ecological problems in the oceans?
3Are big cities polluted?