If you don’t go to visit our former teacher, ________ I.

Have you ever been to ______ aquarium inQingdao before

The argument remains extremely heatedit is necessary to frequently update teaching material.

She ________ an old friend of hers yesterday while she was shopping at the department store.[ ]

The victims of the accident demanded that the case _____ into at once and they _____ a reasonable explanation and a just treatment.