15.
A. Probably the phone number the woman wrote down was Mr. Brown's.
B. It was just an hour ago that the woman met Mr. Brown.
C. The woman forgot to write down Mr. Brown's phone number.
D. The woman needed a sheet of paper to put down the phone number.
16.
A. He doesn't think it necessary to refuel the car.
B. He thinks it is difficult to get fuel for the car.
C. He hopes the woman will help him select a fuel.
D. He can manage to get the gasoline they need.
