What will the weather be like tomorrow? -- It be rainy cloudy or sunny. Who knows?A.

问题补充：

-- What will the weather be like tomorrow?

-- It be rainy, cloudy or sunny. Who knows?

A. must

B. might

C. shall

D. should

答案：

A. must

(答案→)B. might

C. shall

D. should

解析：本题的含义是明天天气下雨，多云或晴天都是有可能的，might表示可能性，故本题选B。