【题目】A severe typhoon struck this area, making the train services in suspension(暂停), which are now back to ___.
A.usual
B.normal
C.common
D.regular

【答案】B
【解析】句意：一场强台风袭击了这个地区，使列车暂停运行，现在已经恢复正常了。本题考查词组back to normal恢复正常。故选B。