By the time we got to the party, all the pizza ___ (eat).
HAD BEEN EATEN
Don’t turn round! I think we ___ (follow)!
ARE BEING FOLLOWED
3D films ___ (exist) since 1922, when "The Power of Love" ___ (premiere).
HAVE EXISTED / WAS PREMIERED
I think hotels ___ (build) in space in the future.
WILL BE BUILT
Smoking ___ (not allow) on planes.
ISN'T ALLOWED
The traffic is terrible this week because a volleyball tournament ___ (hold) in our town.
IS BEING HELD
This tree is centennial. It ___ (plant) in the 19th century.
WAS PLANTED
This piece of music ___ (not record) yet. I've just composed it.
HASN'T BEEN RECORDED
The thieves ___ (steal) the necklace from the safe yesterday.
STOLE
These photos ___ (take) by my grandfather when I was five.
WERE TAKEN
Not much ___ (know) about this complicated subject.
IS KNOWN
Jenny ___ (complain) to the manager about the faulty items right now!
IS COMPLAINING
The report ___ (must finish) by Friday.
MUST BE FINISHED
I'm not sure why the parcel hasn't arrived yet. It ___ (might lose) in the mail.
MIGHT HAVE BEEN LOST
I hate ___ (tell) what to do!
BEING TOLD
The report needs ___ (finish) by Friday.
TO BE FINISHED
