Passive Voice in Unreal Conditional Sentences

If effective cures for cancer and heart disease were discovered, millions of lives ___ (save).

• would be saved

• will be saved

• would have been saved

• were being saved

If effective cures for cancer and heart disease ___ (discover), millions of lives would be saved.

• are discovered

• were discovered

• had been discovered

• will be discovered

The iPhone ___ (invent) If Steve Jobs hadn't returned to serve as CEO of Apple.

• might never have been invented
• will never have been invented

• could never have been invented

• would might be never invented

The iPhone ___ (invent) If Steve Jobs hadn't returned to serve as CEO of Apple.

• will never have been invented

• wasn't invented

• might never have been invented

• might have been invented

If the smartphone ___ (invent), social media would never have been as popular as it is now.

• had been invented

• hadn't invented

• was being invented

• hadn't been invented

If petroleum ___ (use) as the world's primary energy source, the world's economies would be changed.

• hadn't been used
• weren't used

• was used

• is used

If petroleum weren't used as the world's primary energy source, the world's economies ___ (change).

• would be changed

• will be changed

• will be changing

• was changed

If the majority of surgeries ___ (perform) by robots, remote surgeries would be more accepted.

• will be performed

• are performed

• were performed

• could be performed

If the majority of surgeries were performed by robots, remote surgeries ___ (more accept).

• will have been more accepted

• will be more accepted

• would more accepted

• would be more accepted

If effective cures for cancer and heart disease ___ (discover), millions of lives ___ (save).