题目

—What were you doing when I rang you this morning? —I was occupied ________ the housework and kept my soil occupied ________ his homework. A．at; in doing                      B．with; in doing C．al; to do                         D．with; to do 答案：B be occupied with sth.和be occupied in doing sth.的意思都是“忙于做某事”。12．太阳活动强烈时，有可能影响手机信号的强弱．对（判断对错）