第15题: [单项选择]As a general rule, September is the worst month of the year for hurricanes in the Gulf(). A. Normally B. On rare occasions C. Invariably D. Sometimes 参考答案:A 答案解析:
[分析] 副词辨析。 as a general rule=in general一般说来,大体上,通常:normally正常地,通常地;on occasions偶尔,有时,间或:invari