The president of the World Bank says he has a passion for China，________ he remembers starting as early as his childhood.
A．where B．which
C．what D．when
He wrote a letter ________ he explained what had happened in the accident.
A. what B. which
C. where D. how
He may win the competition, ________ he is likely to get into the national team.
A．in which case B．in that case
C．in what case D．in whose case
There is no simple answer, ________ is often the case in science.
A. as B. that
C. when D. where
Nowadays people are more concerned about the environment ________ they live.
A. what B. which
C. when D. where
____is often the case with children, Amy was better by the time the doctor arrived.
A. It B. That
C. What D. As
