13. My father waters these flower every morning.→ These flowers ...... by my father every morning.
A.are watered B.are waters C.is watered D. watered
14. People use computers all over the world.→ Computers..........all over the world.
A.are used B.is used C.are use D. used
15. They keep many ancient things in museums.→ Many ancient things........ in museums.
A.is kept B.are keept C.are keep D.are kept
16. John invited Fiona to the party last night.→ Fiona .........was invited to the party by John last night.
A.was invited B.was invite C.were invited D. invited
17. This computer ________for two years.
A.used B.has used C. has been used D.have been used
18. America _______by Christopher Columbus.
A.discovered B.were discovered C.was discovered D.was discovere
19. I think this institution (widen)__________ twice since 2000.
A.has been widened B.have been widened C. been widened D.has been widen
20. Sydney Opera House in Australia (finish) _________in 1999.
A.was finished B.was finish C.were finished D. finished
13. My father waters these flower every morning.→ These flowers ...... by my father every morning.
A.are watered B.are waters C.is watered D. watered
14. People use computers all over the world.→ Computers..........all over the world.
A.are used B.is used C.are use D. used
15. They keep many ancient things in museums.→ Many ancient things........ in museums.
A.is kept B.are keept C.are keep D.are kept
16. John invited Fiona to the party last night.→ Fiona .........was invited to the party by John last night.
A.was invited B.was invite C.were invited D. invited
17. This computer ________for two years.
A.used B.has used C. has been used D.have been used
18. America _______by Christopher Columbus.
A.discovered B.were discovered C.was discovered D.was discovere
19. I think this institution (widen)__________ twice since 2000.
A.has been widened B.have been widened C. been widened D.has been widen
20. Sydney Opera House in Australia (finish) _________in 1999.
A.was finished B.was finish C.were finished D. finished