| to make polite requests or ask for Could and Would are more polite | they are the same in all persons, singular and plural except for need to and have to |
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| question 2 : 1- some travellers are afriad of flying and prefer to go by train | 2- its is the female , not the male , which produces the baby animals |
6- the birds built a nest last week , and now there are four small , blue eggs in it.
| Do you enjoy a challenge? 4- male animals are usually bigger and heavier than females | answer : they are picnicking in the park |
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| 5- in some countries , serious floods are always a real threat after heavy rain | they are followed by the base form of a verb, without to |
| Unit 5 Making Choices Unit 6 Culture Shock EXPANSION Units 4-6 Vocabulary Writing Checklists Irregular Verbs Photo Credits Audio Track List | |
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