She on her work so much that she didn’t notice that a crowd of people had around her. A.

问题补充：

She on her work so much that she didn’t notice that a crowd of people had around her.

A. focused; focused

B. fixed; gathered

C. concentrated; concentrated

D. carried; collected

答案：

A. focused; focused

(答案→)B. fixed; gathered

C. concentrated; concentrated

D. carried; collected

解析：第一空表示：专注于,focus on和concentrate on都可以，第二空填gather“聚集”句意是：她专注于学习以至于没注意到一群人围在她身边。选B。