Ex.2 p.61 Look at this sentence from the model text and choose the correct word in the rule.

I like the carnival because the music is great and people are happy.

Because comes before / after the reason in a sentence.
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Giraffe is one of the tallest animals on Earth. Giraffes live in the savannas of Africa. The largest population of giraffes today live in reserves. Giraffes are exclusively herbivores. They prefer trees of acacia. Fluid requirement is covered mainly by food, which is why the giraffe can go without drinking for weeks. If he still drinks, it can at one time up to 38 liters of drinking water. Giraffes live alone or in small flocks, not really tied to each other. Like fingerprints, color giraffe is also unique. I think giraffes are very beautiful animals and we must protect its habitat.

1. Bill has been away from work all this week.
2. Glenda worked extremely hard when she was a student.
3. Pippa __has been__rather unfriendly recently.
4. Eric ___had opened___the door before I rang the bell.
5. How long __hasNeil ___had___his present job?
6. ___Has___Tina__visited___her parents since she got married?
7. Why ___didyou putyour coat on? It’s not cold.
8. Jock __complained___to me about his problems last night.
9. Fred ___forgot___his map. We’ll have to go back for it.
10. Jane __ernedmore money in her last job, but she enjoys this one more.