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Speaking reference notes: This topic is refereed from another speaking topic, developed by user: ftn
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Speakings by user Ekhlass1980
:
- q5 75
- Bioluminescence Bioluminescence occurs when organisms convert chemical energy into visible light. This happens when a chemical reaction involving oxygen and two other molecules takes place. During this reaction, light of varying colors may be emitted. The 80
- Some people prefer to have one long vacation. Other people prefer to have several short vacations. Which do you prefer? Use specific reasons and examples to support your answer. 60
- q3 75
- Q3 75
24 in 30
'seconds' again.