If it ________ for the heavy rain then, we would have arrived here ahead of time.

John, look at the time. ______ you play the piano at such a late hour ?

 Now 70 years old, the British physicist, Pendry can’t remember a time when he was not asking a question as a kid, joking that he ________ his parents to death.

(2013·哈尔滨四校高三统一检测)Look! There are so many mistakes in your composition. You ________ have fixed full attention on it.

Has it been warned that all the children in this area      stay at their homes until the Flu has been controlled ?