—Must I go through the radiation (辐射) check when I come back from Japan at the airport these days?—Yes, you ______. 

— ______ you sing the English song?— Yes, I can. But only a little.

 — Mum, would you please buy me an ipad?— If you can help do the dishes the whole vacation, you ______ have one as a reward.

—What is the result of the survey?—15% of those surveyed worry that in the long term children _________ be more dependent on their parents, which does no good to them.

— There'ssomeone knocking on the door. Who _____it be?— It must be Mary. She promised to be here at 8：00.