By the time I saved enough money, the price of the camera _____ by ten percent.
A.had risen
B.has risen
C.was rising
D.rose

By the time Sam got home from school, his brother _____ all the cake.
A.had eaten
B.was eating
C.has been eating
D.has eaten

I was upset to learn that my first opponent would be Sam Muller, who ___part in tournaments for no less than ten years.
A.was taking
B.has been taking
C.had been taking
D.took

Daisy would be happier if she won the first prize.
A.Daisy doesn’t win the first prize.
B.Daisy is trying win the first prize.
C.Daisy is dreaming about winning the first prize.
D.Daisy won the first prize.

If your flight is delayed, call me from the airport.
A.Call me only if your flight is delayed.
B.Don’t call me until you arrive at the airport.
C.Give me a ring if your flight was delayed.
D.Give me a ring if your flight is delayed.

They went home after they ___ their work.
A.have finished
B.had finished
C.finished
D.would have finished

I wondered why he ______ his job.
A.has changed
B.changes
C.used to change
D.had changed

Peter left half an hour ago. He ____ for you for a long time then.
A.was waiting
B.has been waiting
C.will be waiting
D.had been waiting

If I could speak Spanish, I ______ next year studying in Mexico.
A.will spend
B.had spent
C.would have spent
D.would spend

If energy ______ inexpensive and unlimited, many things in the world would be different.
A.is
B.will be
C.would be
D.were