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13- He worked hard. He felt very bad.
→ The __________
14- When we think of the exam, we get more and more excited.
→ The __________
15- As this road gets busier, it becomes more and more dangerous.
→ The __________
16- When you get near to the Equator, the temperature becomes high.
→ The __________
17- If she stays in England a long time, her English will be very good.
→ The __________
18- You write fast, your writing becomes illegible.
→ The __________