EX4. Complete the following sentences with the correct form of the words in brackets.

1. It  is _traditional    in  America  to  eat  turkey  on  Thanksgiving  Day. (tradition)

2. What forms of    _entertainment _  you participate in during the festival? (entertain)

3. The hall looked very ___festively _with its Christmas tree. (festival)

4. Her eyes were wide with __exciting_when she heard the news. (excite)

5. The Chinese New Year marks the _begin_of spring and the start of the Lunar New Year. (begin)

1. It is traditional in  America to eat turkey on Thanksgiving  Day. (tradition)

2. What forms of entertainment do you participate in during the festival? (entertain)

3. The hall looked very festive with its Christmas tree. (festival)

4. Her eyes were wide with excitement when she heard the news. (excite) 

5. The Chinese New Year marks the beginning of spring and the start of the Lunar New Year. (begin)

EX6. Use the correct form of the words given to complete the sentences.

1. The calories in the food we eat are a form of (chemistry) chemical energy.

2. She said that it was (polite) impolite of him to ask her age.

3. Apple Inc., has been one of the (lead) leaders in the computer software field.

4. He has carried out extensive research into (renew) renewable energy sources (such as water or wind energy).

5. My brother works as a lab (technique) technology at a large company.

6. A scientist who studies numbers, shapes, amounts, and their relationships is a (mathematics)  

EX 4. Put the verbs in brackets in the correct tenses.

1. The four planets closest to the sun – Mercury, Venus, Earth, and Mars - (be) are called the terrestrial planets because they have solid, rocky surfaces.

2. Our grandparents (come) are going to come to stay with us next weekend.

3. People wondered for ages whether we are alone in the universe. (wonder)

4. This time next week, we (take) will be taking an English test.

5. By the end of this year, I (learn) will have learned English for 6 years.

6. By the end of this century, scientists (discover) will have discovered intelligent life.

7. Beagle 2 - the first British spaceship to Mars - (look for) will be looking for signs of aliens this time next month.

8. Astronauts (travel) will have traveled to planets outside our solar system by 2050.

9. I expect your English (improve) will have improved a lot by the time you got back from England.

10. NASA (develop) will have developed new aircraft to replace space shuttles by the end of this decade.