Not until I began to work __________ how much time I had wasted.
A. didn’t realize
B. did I realize
C. I didn’t realize
D. I realized
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On the wall __________ two large pictures.
A. hangs
B. hang
C. hanged
D. hanging
Little __________ that she was seriously ill herself.
A. Susan know
B. did Susan know
C. knew Susan
D. was Susan known
__________, you wouldn’t have got into trouble.
A. If you were to take my advice
B. Should you take my advice
C. Had you taken my advice
D. If you took my advice
沟通途径为组织内超越了部门、单位以及层次等各种社会关系的沟通方式是（ ）。
A. 正式沟通
B. 非正式沟通
C. 上行沟通
D. 下行沟通
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