In Jan., 2010, Xin Jiang was struck by so terrible a snow______few people had ever experienced before

With the good care taken by doctors and nurses, most patients injured in this traffic accident are beginning to ________.

Emergency line operators must always___calm and make sure that they get all the information they need to send help.

Which is more important, English or math —I think English is as _______ as math.

In my opinion，keeping dogs should not be banned，but________to certain areas.