3. The second listening
A. Listening and explanation
Play the tape again.Let the Ss listen the second time. While listening, I explain the language points. Make sure the Ss understand it.
a. the other day = a few days ago
b They don't get enough air:
With a bowl, only a small surface area of the water is in contact with the air. So the water does not receive enough oxygen.
c 30 cm by 30 cm by 50 cm.
We describe two-dimensional and three-dimensional measurements using the word by. So the length of the tank is 50 cm, and the width and height both 30 cm.
e underwater plants:
These plants oxygenate the water and keep it clean.
d For one thing = one reason (for putting plants in the tank)
Step 5 . Practice and deep understanding
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高中英语SEFC Book 2A Unit 12 教案