（题文）We climbed up to the top of a hill,___________ we got a good view of the whole forest park.
A. which B. where
C. when D. that
__________ Beijing Opera to the basic education in China is a big step to promote traditional art.
A. Adding B. Added
C. Add D. Having added
_____ there is still a long way to go, we believe that the doctor-patient relationship in China is gradually improving.
A. Because B. Unless
C. Although D. Once
Last year, every employee in our company _____ a physical examination free of charge.
A. offered B. was offered
C. has offered D. had been offered
Upon arriving home, Lily found that her husband _____ a beautiful candlelight dinner.
A. had prepared B. is preparing
C. has prepared D. would prepare
Astronomers have discovered that three planets have sizes and temperatures similar to _______ of Earth.
A. them B. these
C. those D. ones
