Bị động buổi 4

Coal can.........to produce electricity for humans

• have used

• be used

• use

• used

You can see the house.... for years

• isn't painted

• hasn't painted

• hasn't bee painted

• hadn't painted

Some new oilfields..... since 1976

• were opened up

• has opned up

• have been opned up

• had been opened up

This medicine.......before dinner

• should have taken

• ought to take

• should take

• should be taken

This report needn't .................

• to be typed

• typed

• type

• be typed

All the windows.......

• close

• have closed

• closed

• have been closed

Ms . Haugen......at the Ajax Company

• is employing

• employed

• employing

• is employed

Last night a tornado swept through Rockville. It........... everything in its path.

• destroyed

• was destroyed

• was being destroyed

• had been destroyed

World War I.......in 1914

• broke out

• was broken out

• had broken out

• was happened

About 15000 years ago, Northern Wisconsin........under ice a mile deep

• buried

• was burying

• was buried

• had buried