| B. Fill in each gap with one suitable word (1 pts):
People need to breathe. If we don’t (5)..................., we will die. But how clean is the air people breathe? If we breathe (6) ___________ air, we will have breathing problems. Plants and animals need clean air too. A lot of the things in our lives create harmful gases and (7)........................ the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air (8)......................... can also make our Earth warmer.
V. WRITING: A. Arrange the following sentences (1 pts)
1. Why don't we make some cake? --> What about...........................................................
2. How much is this book? --> What.................................................................................?
3. She started working in this company 8 years ago.
--> She has...........................................................................................................................
4. This is the first time I saw such a big pumpkin.
--> I have never...................................................................................................................
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