IV. Change clauses of reason to phrases of reason.

Lý thuyếtTrang 347
  1. Jim had to give up jogging because he had sprained his ankle severely.
  2. The water in most rivers is unsafe to drink because it's polluted.
  3. We had to stay in London an extra day because it was foggy at the airport.
  4. Bill has to do all of the cooking and cleaning because his wife is ill.
  5. We all have received the best of everything because our parents are generous.
  6. I couldn't get to sleep last night because it was noisy in the next apartment.
  7. John has to sit in the front row in class because he has poor eyesight.
  8. We stopped our car because the traffic lights turned red.
  9. She couldn't see the road because the wall was too high.
  10. We postponed our trip because the driving conditions were bad.
  11. Sarah will not walk across a bridge because she's afraid of heights.
  12. Mark's doctor has advised him to exercise regularly because he is overweight.
  13. Piranhas can devour an entire cow in several minutes because their teeth are extremely sharp.
  14. Most students couldn't do the final exam because it was extremely difficult.
  15. John succeeded in his exam because he worked hard and methodically.

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