She was so lost in her own thought that she was not the coming danger .A. careful aboutB.

问题补充：

She was so lost in her own thought that she was not the coming danger .

A. careful about

B. interested in

C. concerned with

D. aware of

答案：

A. careful about

B. interested in

C. concerned with

(答案→)D. aware of

解析：短语辨析。Be careful about注意；be interested in对……感兴趣；be concerned with关心，关注；be aware of知道，意识到。句意：她陷入沉思中没有意识到即将到来的危险。所以选D。