中国传媒大学21春《大学英语(二)》作业考核【标准答案】.docx

21春传媒《大学英语(二)》作业考核 试卷总分:100 得分:100 一、单选题 (共 50 道试题,共 100 分) 1.—What were you doing this time yesterday? —I _______ some cleaning at home. A.am doing B.was doing C.do D.did 答案:B 2.You ________ reach him on his mobile now --- his mobile is still under repair. A.shouldn’t B.wouldn't C.can't D.mustn't