（ ） that company to see how they think of our product yesterday? — Yes. They are happy with it.
（A）Did you call
（B）Have you called
（C）Will you call
（D）Were you calling
Jack （ ） in the lab when the power cut occurred.
（A）works
（B）has worked
（C）was working
（D）would work
Excuse me, which movie are you waiting for? — The new The Avengers. We （ ） here for more than two hours.
（A）waited
（B）wait
（C）would be waiting
（D）have been waiting
