1. Since, for some time, our service ___limited to the area of Fulton, we withdrew the rest of the ads.
A. must have been
C. had to be
B. has been
D. would have been
2. Well, I understand that they couldn't drive on because of the snowstorm. But if they knew they were going to be late, they_____ me up to save us some needless waiting.
A. could ring
B. would have to ring
C. were able to ring
D. might have rung