Though it was midnight, she found her daughter sitting at the dest, completely ________ her homework
A.absorbing inB.absorbed inC.absorbing intoD.absorbed into在线课程B
解析：
be absorbed in “专心于”，absorb与句子主语her daughter为动宾关系所以用过去分词作状语。句意：虽然已是午夜了她发现女儿坐在桌子旁边完全专心于学习中。