He is not native; if he were, we ______ this discussion over his identity.

—— Nacy＿＿＿＿＿＿＿＿＿ the letter from her mother. —— No, she can’t have. The postman hasn’t come yet. 

According to the school rules, no child _______ be allowed out of the school during the day, unless accompanied by an adult．

At the conference, Premier Li Keqiang urged all the government departments ______ effective measures to improve work efficiency.

—I left my handbag on the train, but luckily someone gave it to a railway official.—How unbelievable to get it back！I mean, someone ________it.