Question

Great changes have taken place in that school. It is no longer ___ it was 20 years ago, ___ it was so poorly equipped. 

A．what, when

B．that, which

C．what, which

D．which, that

Answer 1

A

It is no longer ___ it was 20 years ago中，___ it was 20 years ago是表语从句，且句中缺少was的表语，第一空用what；___ it was so poorly equipped.是定语从句，先行词是20 years ago，在句中作时间状语。所以选A。