Hurry up! The black clouds that it is going to rain soon.A. troubleB. adviseC. indicateD.

问题补充：

Hurry up! The black clouds that it is going to rain soon.

A. trouble

B. advise

C. indicate

D. appear

答案：

A. trouble

B. advise

(答案→)C. indicate

D. appear

解析：考察动词，trouble 麻烦 advise建议 indicate表明 ，预示，象征appear出现，

句意为，快点，那些黑云预示着要下雨了。