13. Match the underlined parts (1-6) of the reading text (exercise 8) with a tense. 

present perfect continuous

present perfect simple

past perfect simple

past perfect continuous

past simple

past continuous

14. Match each tense in exercise 13 with its use.

a. To describe completed actions in the past

b. To describe an action happening around a given time in the past

c. To describe a continuous action that started in the past and is still happening now

d. To describe an action completed before a given time or other action in the past

e. To describe an action that happened in the past but has a connection to or important effect on the present

f. To describe an action or repeated actions up to a given time in the past 

15. Choose the correct form of the verb.

1. Warhol's celebrity portraits had been/ have been/ were popular since the 1960s.

2. Rauschenberg was marrying/ married/ has married Susan Weil in 1950 but their marriage only had lasted/ lasted/ had been lasting until 1953.

3. Artists have now been developing/ had now been developing/ had now developed Rauschenberg's ideas for more than half a century.

4. The advent of digital technology had/ has had/ has been having a big impact on the art world.

5. When Rauschenberg arrived in New York, Warhol had been living and working/ has been living and working/ lived and worked there for several years.