1．__________ made the little boy so sad is __________ his parents didn’t allow him to go out for a picnic with other boys.
A．What；because
B．What；that
C．That；because
D．That；what
解析：选B。句意：使这个小男孩如此伤心的是他的父母不允许他跟其他男孩出去野餐。第一空用what引导主语从句，what在从句中作主语；第二空用that引导表语从句，that在从句中不作任何成分，也没有实际意义，只起连接作用。
