1. Dr. Rowan, ________ secretary resigned two weeks ago, has had to do all his own typing.

    A. whose                B. of whom          C. of which         D. which

2. The student completed this experiment to make come true ________ Professor Joseph had said.

    A. that             B. what             C. when             D. where

3. He is sure to pass the test, for he ______his lessons for the test every day over the past month.

    A. will review                      B. was reviewing       

C. has been reviewing               D. had been reviewing