Yesterday my aunt sent me an email _______she told me she would come to see me next week.
A. which B. where
C. that D. when
The virtues of thrift（节俭）and hard work is vital for everyone, __________is often the case in any society.
A、as B、that
C、when D、where
They reached the top of the mountain__________ they could see the highway wandering before them.
A. which B．why
C. whose D. where
Mr. Sawyer started his career at Stanford University, _____ he became Professor of Physics in 2002.
A. which B. where
C. when D. that
I still remember the accident and the troubles ______ has caused to me.
A. which B. what
C. it D. that
I looked through the window of our hotel, ______ I saw a man taking photos in the yard.
A. where B. at which
C. when D. from where
