It is the discovery of Cao Cao’s tomb, _____ was made in Anyang, Henan province, ____ has received widespread attention．

Some wild animals are in danger ________ the loss of living areas.[ ]

Do you know sound travels very fast? — Yes. But light travels sound.

Did you pass the exam? —Yes, but I can’t pass it _____ the teacher’s help. [ ]

Is this _______notebook?—No, it isn’t_________.