Choose the right variant. write down the answer as shown in the example.

example: 1a 2b 3c 4d

1. we when somebody on the door.

a. were talking / was knocking

b. had been talking / knocked

c. were talking / knocked

d. had been talking / had knocked

2. ian at the factory long when he a manager.

a. was working / had been made

b. had been working / was made

c. had been working / made

d. had worked / made

3. sally for two years when she the race.

a. trained / entered

b. was training / was entering

c. had trained / had entered

d. had been training / entered

4. jimmy out of breath because he

a. had been / was running

b. was / was running

c. was / had been running

d. had been / had been running

1. All the pupils were sitting at their desks, when the teacher came into the classroom.

2. Jane was walking in the park last Sunday when she met Chris.

3. I am leaving the house when it began raining yesterday.

4. We were at home and we were listening to music while Arnold was speaking on the phone.

5. When I was walking my dog, it began snowing.

6. While my sister was making tea, I was washing my cups.

7. We were driving in the car when we heard that noise.

8. The children were fed their cat when a big dog ran into the garden.

Объяснение:

The Egyptian Science and Engineering Olympiad is a national science and engineering fair and Olympiad for schools. The Program focuses on improving teachers and students’ skills and experience in Science, Engineering, Technology and Mathematics (STEM) fields in Egypt.

Teachers and Students in schools will participate in training programs to prepare them to have their own school science and engineering fair and Olympiad and then qualify the winners to the city fair and Olympiad. Top winners from each city will compete at the National Science and Engineering Fair and Olympiad.