passive

Extreme weather conditions (to cause) by climate change in recent years.

• have been caused
• has been caused
• were caused
• are being caused

New Orleans (to hit) by a huge hurricane in 2005. 

• has been hit
• was hit
• were hit
• is being hit

Experts believe that more and more places (to affect) by climate change in the future

• are being affected

• are affected

• will be affected

• will have been affected

A lot (to write) about what governments and businesses should do to slow down global warming. 

• is written
• was written
• have been written
• has been written

A new road (under construction) now.

• is under construction
• is constructing
• was being under construction
• is being under construction

When I arrived, the garbage (to throw) by utility service.

• was thrown
• was throwing
• was being thrown
• has been thrown

It ( to know) that the director is against this plan.

• has been known
• is known
• was known
• had been known

Cotton (to grow) in Egypt.

• was grown
• is grown
• has been grown
• had been grown

Several houses (to destroy) by the hurricane last week.

• are destroyed
• were destroyed
• have been destroyed
• had been destroyed

Experts say that by 2050 the cure for cancer...

• was found
• will find
• will be found
• will have been found