—I rang you at about nine, but there was no reply.—Oh, that was probably       I was seeing the doctor.

The film Twilight, _______ leading characters are Bella and Edward, is a great hit.

 — If our government _____attention to controling food safety now, our health _____in danger.

You should report any incident, ______ minor it is.

Chinese scientists have produced an embryo of a giant panda through cloning technology,_____ is a breakthrough ______ could save the endangered animals.