It is extremely hot this summer. many people say it has been the hottest in the past 30

问题补充：

It is extremely hot this summer. , many people say it has been the hottest in the past 30 years.

A. Frequently

B. Actually

C. Fluently

D. Gradually

答案：

A. Frequently

B. Actually

C. Fluently

D. Gradually

解析：副词词义辨识。frequently: often, 经常。actually: in fact, 事实上、实际上。fluently: 流利地。gradually: 渐渐地。本题是说，今年异常地热。实际情况是，许多人说这是过去30年来最热的天气。故B项正确。