10 years ago， only one classroom building in our school. And in 10 years， five classroom buildings in our school.
A. there will be, there are
B. there was, there will be
C. there will be; there was
D. there was, there are
网友回答
A. there will be, there are
(答案→)B. there was, there will be
C. there will be; there was
D. there was, there are
解析：根据第一空前的时间状语，可知第一空为there be 的一般过去时将AC排除，再根据后文的时间状语in+一段时间，故用一般将来时，故选B