Tom's mother is busy breakfast for Tom.
A:cook
B:to cook
C:cooks
D:cooking
热带和温带的分界线是( )
“三角贸易”是欧洲殖民者掠夺财富的重要手段。观察右图,殖民者从三角贸易中获得的大量财富最终被运回( )