Listen to an interview about El Nino. Choose the correct words to complete the statements. (Nghe cuộc phỏng vấn về El Nino. Chọn các từ đúng để hoàn thành các câu) 1. El Niño events are getting more / less severe. 2. It's likely / unlikely that global warming will have an impact on future El Niño events. 3. Scientists think that El Niño events won't / may get more frequent. 4. Scientists can /can't predict when an El Nino event is going to happen.