1. His sister left home in 1998, and ____ since. ［2009全国卷Ⅰ, 26］
A. had not been heard of B. has not been heard of
C. had not heard of D. has not heard of
2. The way the guests _______ in the hotel influenced their evaluation of the service. ［2009北京, 27］
A. treated B. were treated
C. would treat D. would be treated
