The weather in Beijing in summer is than that in Shanghai. They are different.A. coolB. m

问题补充：

The weather in Beijing in summer is than that in Shanghai. They are different.

A. cool

B. much cooler

C. hot

D. much hotter

答案：

A. cool

(答案→)B. much cooler

C. hot

D. much hotter

解析：句意：北京夏天的天气比深圳夏天的天气更凉爽些。因为句中有形容词的比较级特征词than，符合要求的只有B和D，根据常识可知，北京的天气要比深圳的凉爽而不是热，故选B。